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CVE Vulnerability Details :
CVE-2025-66277
PUBLISHED
More InfoOfficial Page
Assigner-qnap
Assigner Org ID-2fd009eb-170a-4625-932b-17a53af1051f
View Known Exploited Vulnerability (KEV) details
Published At-11 Feb, 2026 | 12:15
Updated At-12 Feb, 2026 | 04:55
Rejected At-
▼CVE Numbering Authority (CNA)
QTS, QuTS hero

A link following vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to traverse the file system to unintended locations. We have already fixed the vulnerability in the following versions: QTS 5.2.8.3350 build 20251216 and later QuTS hero h5.3.2.3354 build 20251225 and later QuTS hero h5.2.8.3350 build 20251216 and later

Affected Products
Vendor
QNAP Systems, Inc.QNAP Systems Inc.
Product
QTS
Default Status
unaffected
Versions
Affected
  • From 5.2.x before 5.2.8.3350 build 20251216 (custom)
Vendor
QNAP Systems, Inc.QNAP Systems Inc.
Product
QuTS hero
Default Status
unaffected
Versions
Affected
  • From h5.3.x before h5.3.2.3354 build 20251225 (custom)
  • From h5.2.x before h5.2.8.3350 build 20251216 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-59CWE-59
Type: CWE
CWE ID: CWE-59
Description: CWE-59
Metrics
VersionBase scoreBase severityVector
4.09.2CRITICAL
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Version: 4.0
Base score: 9.2
Base severity: CRITICAL
Vector:
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-132CAPEC-132
CAPEC ID: CAPEC-132
Description: CAPEC-132
Solutions

We have already fixed the vulnerability in the following versions: QTS 5.2.8.3350 build 20251216 and later QuTS hero h5.3.2.3354 build 20251225 and later QuTS hero h5.2.8.3350 build 20251216 and later

Configurations
Workarounds
Exploits
Credits
finder
coral
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.qnap.com/en/security-advisory/qsa-26-05
N/A
Hyperlink: https://www.qnap.com/en/security-advisory/qsa-26-05
Resource: N/A
▼Authorized 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
Details not found