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Vulnerability Details :

CVE-2025-53593

Summary
Assigner-qnap
Assigner Org ID-2fd009eb-170a-4625-932b-17a53af1051f
Published At-02 Jan, 2026 | 14:56
Updated At-05 Jan, 2026 | 20:39
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 versions: QTS 5.2.7.3256 build 20250913 and later QuTS hero h5.2.7.3256 build 20250913 and later QuTS hero h5.3.1.3250 build 20250912 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 | 14:56
Updated At:05 Jan, 2026 | 20:39
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 versions: QTS 5.2.7.3256 build 20250913 and later QuTS hero h5.2.7.3256 build 20250913 and later QuTS hero h5.3.1.3250 build 20250912 and later

Affected Products
Vendor
QNAP Systems, Inc.QNAP Systems Inc.
Product
QTS
Default Status
unaffected
Versions
Affected
  • From 5.2.x before 5.2.7.3256 build 20250913 (custom)
Vendor
QNAP Systems, Inc.QNAP Systems Inc.
Product
QuTS hero
Default Status
unaffected
Versions
Affected
  • From h5.2.x before h5.2.7.3256 build 20250913 (custom)
  • From h5.3.x before h5.3.1.3250 build 20250912 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-121CWE-121
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:L/VI:L/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:L/VI:L/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 versions: QTS 5.2.7.3256 build 20250913 and later QuTS hero h5.2.7.3256 build 20250913 and later QuTS hero h5.3.1.3250 build 20250912 and later

Configurations

Workarounds

Exploits

Credits

finder
coral
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.qnap.com/en/security-advisory/qsa-25-50
N/A
Hyperlink: https://www.qnap.com/en/security-advisory/qsa-25-50
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 | 15:16
Updated At:05 Jan, 2026 | 20:12

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 versions: QTS 5.2.7.3256 build 20250913 and later QuTS hero h5.2.7.3256 build 20250913 and later QuTS hero h5.3.1.3250 build 20250912 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:L/VI:L/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:L/VI:L/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
>>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>>h5.3.0.3115
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:*:*:*:*:*:*
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:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-121Primarysecurity@qnapsecurity.com.tw
CWE-787Primarynvd@nist.gov
CWE ID: CWE-121
Type: Primary
Source: security@qnapsecurity.com.tw
CWE ID: CWE-787
Type: Primary
Source: nvd@nist.gov
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://www.qnap.com/en/security-advisory/qsa-25-50security@qnapsecurity.com.tw
Vendor Advisory
Hyperlink: https://www.qnap.com/en/security-advisory/qsa-25-50
Source: security@qnapsecurity.com.tw
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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Known To Be Used In Ransomware Campaigns?-Not Available
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