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Vulnerability Details :

CVE-2025-48721

Summary
Assigner-qnap
Assigner Org ID-2fd009eb-170a-4625-932b-17a53af1051f
Published At-02 Jan, 2026 | 15:17
Updated At-02 Jan, 2026 | 19:13
Rejected At-
Credits

QTS, QuTS hero

A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: QTS 5.2.8.3332 build 20251128 and later

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:qnap
Assigner Org ID:2fd009eb-170a-4625-932b-17a53af1051f
Published At:02 Jan, 2026 | 15:17
Updated At:02 Jan, 2026 | 19:13
Rejected At:
â–¼CVE Numbering Authority (CNA)
QTS, QuTS hero

A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: QTS 5.2.8.3332 build 20251128 and later

Affected Products
Vendor
QNAP Systems, Inc.QNAP Systems Inc.
Product
QTS
Default Status
unaffected
Versions
Affected
  • From 5.2.x before 5.2.8.3332 build 20251128 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-120CWE-120
CWECWE-121CWE-121
Type: CWE
CWE ID: CWE-120
Description: CWE-120
Type: CWE
CWE ID: CWE-121
Description: CWE-121
Metrics
VersionBase scoreBase severityVector
4.01.2LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
Version: 4.0
Base score: 1.2
Base severity: LOW
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-100CAPEC-100
CAPEC ID: CAPEC-100
Description: CAPEC-100
Solutions

We have already fixed the vulnerability in the following version: QTS 5.2.8.3332 build 20251128 and later

Configurations

Workarounds

Exploits

Credits

finder
Yuze Wu(h1J4cker)
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.qnap.com/en/security-advisory/qsa-25-51
N/A
Hyperlink: https://www.qnap.com/en/security-advisory/qsa-25-51
Resource: N/A
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@qnapsecurity.com.tw
Published At:02 Jan, 2026 | 16:16
Updated At:06 Jan, 2026 | 13:59

A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: QTS 5.2.8.3332 build 20251128 and later

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.01.2LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Type: Secondary
Version: 4.0
Base score: 1.2
Base severity: LOW
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
CPE Matches

QNAP Systems, Inc.
qnap
>>qts>>5.2.0.2737
cpe:2.3:o:qnap:qts:5.2.0.2737:build_20240417:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.0.2744
cpe:2.3:o:qnap:qts:5.2.0.2744:build_20240424:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.0.2782
cpe:2.3:o:qnap:qts:5.2.0.2782:build_20240601:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.0.2802
cpe:2.3:o:qnap:qts:5.2.0.2802:build_20240620:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.0.2823
cpe:2.3:o:qnap:qts:5.2.0.2823:build_20240711:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.0.2851
cpe:2.3:o:qnap:qts:5.2.0.2851:build_20240808:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.0.2860
cpe:2.3:o:qnap:qts:5.2.0.2860:build_20240817:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.1.2930
cpe:2.3:o:qnap:qts:5.2.1.2930:build_20241025:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.2.2950
cpe:2.3:o:qnap:qts:5.2.2.2950:build_20241114:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.3.3006
cpe:2.3:o:qnap:qts:5.2.3.3006:build_20250108:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.4.3070
cpe:2.3:o:qnap:qts:5.2.4.3070:build_20250312:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.4.3079
cpe:2.3:o:qnap:qts:5.2.4.3079:build_20250321:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.4.3092
cpe:2.3:o:qnap:qts:5.2.4.3092:build_20250403:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.5.3145
cpe:2.3:o:qnap:qts:5.2.5.3145:build_20250526:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.6.3195
cpe:2.3:o:qnap:qts:5.2.6.3195:build_20250715:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.6.3229
cpe:2.3:o:qnap:qts:5.2.6.3229:build_20250818:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.7.3256
cpe:2.3:o:qnap:qts:5.2.7.3256:build_20250913:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>qts>>5.2.7.3297
cpe:2.3:o:qnap:qts:5.2.7.3297:build_20251024:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.0.2737
cpe:2.3:o:qnap:quts_hero:h5.2.0.2737:build_20240417:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.0.2782
cpe:2.3:o:qnap:quts_hero:h5.2.0.2782:build_20240601:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.0.2789
cpe:2.3:o:qnap:quts_hero:h5.2.0.2789:build_20240607:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.0.2802
cpe:2.3:o:qnap:quts_hero:h5.2.0.2802:build_20240620:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.0.2823
cpe:2.3:o:qnap:quts_hero:h5.2.0.2823:build_20240711:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.0.2851
cpe:2.3:o:qnap:quts_hero:h5.2.0.2851:build_20240808:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.0.2860
cpe:2.3:o:qnap:quts_hero:h5.2.0.2860:build_20240817:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.1.2929
cpe:2.3:o:qnap:quts_hero:h5.2.1.2929:build_20241025:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.1.2940
cpe:2.3:o:qnap:quts_hero:h5.2.1.2940:build_20241105:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.2.2952
cpe:2.3:o:qnap:quts_hero:h5.2.2.2952:build_20241116:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.3.3006
cpe:2.3:o:qnap:quts_hero:h5.2.3.3006:build_20250108:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.4.3070
cpe:2.3:o:qnap:quts_hero:h5.2.4.3070:build_20250312:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.4.3079
cpe:2.3:o:qnap:quts_hero:h5.2.4.3079:build_20250321:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.5.3138
cpe:2.3:o:qnap:quts_hero:h5.2.5.3138:build_20250519:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.6.3195
cpe:2.3:o:qnap:quts_hero:h5.2.6.3195:build_20250715:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.7.3256
cpe:2.3:o:qnap:quts_hero:h5.2.7.3256:build_20250913:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.2.7.3297
cpe:2.3:o:qnap:quts_hero:h5.2.7.3297:build_20251024:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.3.0.3115
cpe:2.3:o:qnap:quts_hero:h5.3.0.3115:build_20250430:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.3.0.3145
cpe:2.3:o:qnap:quts_hero:h5.3.0.3145:build_20250530:*:*:*:*:*:*
QNAP Systems, Inc.
qnap
>>quts_hero>>h5.3.0.3192
cpe:2.3:o:qnap:quts_hero:h5.3.0.3192:build_20250716:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-120Primarysecurity@qnapsecurity.com.tw
CWE-121Primarysecurity@qnapsecurity.com.tw
CWE ID: CWE-120
Type: Primary
Source: security@qnapsecurity.com.tw
CWE ID: CWE-121
Type: Primary
Source: security@qnapsecurity.com.tw
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://www.qnap.com/en/security-advisory/qsa-25-51security@qnapsecurity.com.tw
Vendor Advisory
Hyperlink: https://www.qnap.com/en/security-advisory/qsa-25-51
Source: security@qnapsecurity.com.tw
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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EPSS-0.08% / 23.80%
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QTS, QuTS hero, QuTScloud

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.4.2596 build 20231128 and later QuTS hero h5.1.4.2596 build 20231128 and later QuTScloud c5.1.5.2651 and later

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CVSS Score-5.5||MEDIUM
EPSS-0.06% / 19.05%
||
7 Day CHG~0.00%
Published-02 Feb, 2024 | 16:04
Updated-02 Aug, 2024 | 18:54
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero, QuTScloud

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.2.2533 build 20230926 and later QuTS hero h5.1.2.2534 build 20230927 and later QuTScloud c5.1.5.2651 and later

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Product-quts_heroqutscloudqtsQuTScloudQuTS heroQTS
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Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVE-2023-45037
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Vendor-QNAP Systems, Inc.
Product-quts_heroqutscloudqtsQTSQuTScloudQuTS hero
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Matching Score-6
Assigner-QNAP Systems, Inc.
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Assigner-QNAP Systems, Inc.
CVSS Score-3.8||LOW
EPSS-0.08% / 23.80%
||
7 Day CHG~0.00%
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Updated-17 Jun, 2025 | 20:29
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.4.2596 build 20231128 and later QuTS hero h5.1.4.2596 build 20231128 and later

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||
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Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.4.2596 build 20231128 and later QuTS hero h5.1.4.2596 build 20231128 and later

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Assigner-QNAP Systems, Inc.
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Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-3.8||LOW
EPSS-0.08% / 23.80%
||
7 Day CHG~0.00%
Published-05 Jan, 2024 | 16:18
Updated-26 Aug, 2024 | 18:42
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.4.2596 build 20231128 and later QuTS hero h5.1.4.2596 build 20231128 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqtsQuTS heroQTS
CWE ID-CWE-120
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Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-3.8||LOW
EPSS-0.08% / 23.80%
||
7 Day CHG~0.00%
Published-05 Jan, 2024 | 16:18
Updated-17 Jun, 2025 | 20:29
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.4.2596 build 20231128 and later QuTS hero h5.1.4.2596 build 20231128 and later

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Vendor-QNAP Systems, Inc.
Product-quts_heroqtsQTSQuTS hero
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVE-2023-41273
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-5.5||MEDIUM
EPSS-0.05% / 15.83%
||
7 Day CHG~0.00%
Published-02 Feb, 2024 | 16:03
Updated-02 Aug, 2024 | 18:54
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero, QuTScloud

A heap-based buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.2.2533 build 20230926 and later QuTS hero h5.1.2.2534 build 20230927 and later QuTScloud c5.1.5.2651 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqutscloudqtsQuTScloudQuTS heroQTS
CWE ID-CWE-122
Heap-based Buffer Overflow
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-787
Out-of-bounds Write
CVE-2023-41280
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-5.5||MEDIUM
EPSS-0.06% / 19.05%
||
7 Day CHG~0.00%
Published-02 Feb, 2024 | 16:04
Updated-02 Aug, 2024 | 18:54
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero, QuTScloud

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.2.2533 build 20230926 and later QuTS hero h5.1.2.2534 build 20230927 and later QuTScloud c5.1.5.2651 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqutscloudqtsQuTScloudQuTS heroQTS
CWE ID-CWE-121
Stack-based Buffer Overflow
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVE-2023-41277
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-5.5||MEDIUM
EPSS-0.05% / 14.60%
||
7 Day CHG~0.00%
Published-02 Feb, 2024 | 16:04
Updated-17 Jun, 2025 | 21:29
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero, QuTScloud

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.2.2533 build 20230926 and later QuTS hero h5.1.2.2534 build 20230927 and later QuTScloud c5.1.5.2651 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqutscloudqtsQTSQuTScloudQuTS hero
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-121
Stack-based Buffer Overflow
CVE-2023-41292
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-3.8||LOW
EPSS-0.08% / 23.80%
||
7 Day CHG~0.00%
Published-02 Feb, 2024 | 16:04
Updated-17 Jun, 2025 | 21:29
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero, QuTScloud

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.4.2596 build 20231128 and later QuTS hero h5.1.4.2596 build 20231128 and later QuTScloud c5.1.5.2651 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqutscloudqtsQTSQuTScloudQuTS hero
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVE-2025-48724
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-0.6||LOW
EPSS-0.10% / 26.75%
||
7 Day CHG~0.00%
Published-11 Feb, 2026 | 12:19
Updated-11 Feb, 2026 | 21:18
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Qsync Central

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-qsync_centralQsync Central
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2023-41279
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-5.5||MEDIUM
EPSS-0.06% / 19.05%
||
7 Day CHG~0.00%
Published-02 Feb, 2024 | 16:04
Updated-02 Aug, 2024 | 18:54
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero, QuTScloud

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.2.2533 build 20230926 and later QuTS hero h5.1.2.2534 build 20230927 and later QuTScloud c5.1.5.2651 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqutscloudqtsQuTScloudQuTS heroQTS
CWE ID-CWE-121
Stack-based Buffer Overflow
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVE-2023-41276
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-5.5||MEDIUM
EPSS-0.05% / 14.60%
||
7 Day CHG~0.00%
Published-02 Feb, 2024 | 16:04
Updated-17 Jun, 2025 | 21:29
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero, QuTScloud

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.2.2533 build 20230926 and later QuTS hero h5.1.2.2534 build 20230927 and later QuTScloud c5.1.5.2651 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqutscloudqtsQTSQuTScloudQuTS hero
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2025-48725
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-0.6||LOW
EPSS-0.10% / 26.75%
||
7 Day CHG~0.00%
Published-11 Feb, 2026 | 12:19
Updated-11 Feb, 2026 | 21:18
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QuTS hero

A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: QuTS hero h5.3.2.3354 build 20251225 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-qtsquts_heroQuTS hero
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-121
Stack-based Buffer Overflow
CVE-2025-48723
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-0.6||LOW
EPSS-0.10% / 26.75%
||
7 Day CHG~0.00%
Published-11 Feb, 2026 | 12:19
Updated-11 Feb, 2026 | 21:18
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Qsync Central

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-qsync_centralQsync Central
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2025-52869
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-0.6||LOW
EPSS-0.13% / 33.17%
||
7 Day CHG~0.00%
Published-11 Feb, 2026 | 12:19
Updated-12 Feb, 2026 | 13:33
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Qsync Central

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-qsync_centralQsync Central
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2025-30265
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-2.3||LOW
EPSS-0.14% / 33.68%
||
7 Day CHG+0.02%
Published-29 Aug, 2025 | 17:15
Updated-22 Sep, 2025 | 17:25
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero

A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following versions: QTS 5.2.5.3145 build 20250526 and later QuTS hero h5.2.5.3138 build 20250519 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqtsQuTS heroQTS
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-121
Stack-based Buffer Overflow
CVE-2023-41275
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-5.5||MEDIUM
EPSS-0.05% / 14.60%
||
7 Day CHG~0.00%
Published-02 Feb, 2024 | 16:04
Updated-09 May, 2025 | 17:41
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero, QuTScloud

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.2.2533 build 20230926 and later QuTS hero h5.1.2.2534 build 20230927 and later QuTScloud c5.1.5.2651 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqutscloudqtsQuTScloudQTSQuTS hero
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2024-56805
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-5.3||MEDIUM
EPSS-0.10% / 28.41%
||
7 Day CHG+0.01%
Published-06 Jun, 2025 | 15:53
Updated-23 Sep, 2025 | 14:25
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero

A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained user access to modify memory or crash processes. We have already fixed the vulnerability in the following versions: QTS 5.2.4.3079 build 20250321 and later QuTS hero h5.2.4.3079 build 20250321 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqtsQTSQuTS hero
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2020-2501
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-9.8||CRITICAL
EPSS-3.75% / 87.76%
||
7 Day CHG~0.00%
Published-17 Feb, 2021 | 03:25
Updated-16 Sep, 2024 | 19:47
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Stack Buffer Overflow in Surveillance Station

A stack-based buffer overflow vulnerability has been reported to affect QNAP NAS devices running Surveillance Station. If exploited, this vulnerability allows attackers to execute arbitrary code. QNAP have already fixed this vulnerability in the following versions: Surveillance Station 5.1.5.4.3 (and later) for ARM CPU NAS (64bit OS) and x86 CPU NAS (64bit OS) Surveillance Station 5.1.5.3.3 (and later) for ARM CPU NAS (32bit OS) and x86 CPU NAS (32bit OS)

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-surveillance_stationnasSurveillance Station
CWE ID-CWE-121
Stack-based Buffer Overflow
CWE ID-CWE-787
Out-of-bounds Write
CVE-2024-53695
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-6.3||MEDIUM
EPSS-0.18% / 39.28%
||
7 Day CHG~0.00%
Published-07 Mar, 2025 | 16:13
Updated-16 Jan, 2026 | 18:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
HBS 3 Hybrid Backup Sync

A buffer overflow vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If exploited, the vulnerability could allow remote attackers to modify memory or crash processes. We have already fixed the vulnerability in the following version: HBS 3 Hybrid Backup Sync 25.1.4.952 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-hybrid_backup_syncHBS 3 Hybrid Backup Sync
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE ID-CWE-121
Stack-based Buffer Overflow
CVE-2023-23363
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-8.1||HIGH
EPSS-0.66% / 70.58%
||
7 Day CHG~0.00%
Published-22 Sep, 2023 | 03:50
Updated-24 Sep, 2024 | 18:10
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS

A buffer copy without checking size of input vulnerability has been reported to affect QNAP operating system. If exploited, the vulnerability possibly allows remote users to execute code via unspecified vectors. We have already fixed the vulnerability in the following versions: QTS 4.3.6.2441 build 20230621 and later QTS 4.3.3.2420 build 20230621 and later QTS 4.2.6 build 20230621 and later QTS 4.3.4.2451 build 20230621 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-qtsQTS
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVE-2023-23364
Matching Score-6
Assigner-QNAP Systems, Inc.
ShareView Details
Matching Score-6
Assigner-QNAP Systems, Inc.
CVSS Score-8.1||HIGH
EPSS-0.66% / 70.58%
||
7 Day CHG~0.00%
Published-22 Sep, 2023 | 03:51
Updated-24 Sep, 2024 | 18:09
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Multimedia Console

A buffer copy without checking size of input vulnerability has been reported to affect QNAP operating systems. If exploited, the vulnerability possibly allows remote users to execute code via unspecified vectors. We have already fixed the vulnerability in the following versions: Multimedia Console 2.1.1 ( 2023/03/29 ) and later Multimedia Console 1.4.7 ( 2023/03/20 ) and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-multimedia_consoleMultimedia Console
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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