Out-of-Bounds Read Vulnerability in QNAP Operating Systems
CVE-2025-54166

4.6MEDIUM

Key Information:

Vendor

QNAP
Status
Qts
Quts Hero
Vendor
CVE Published:
2 January 2026

What is CVE-2025-54166?

An out-of-bounds read vulnerability has been identified in several QNAP operating system versions, allowing remote attackers with administrator-level access to exploit the issue and retrieve confidential data. Ensuring that systems are updated to the latest versions is critical for safeguarding against unauthorized data access.

Affected Version(s)

QTS 5.2.x < 5.2.7.3256 build 20250913

QuTS hero h5.2.x

QuTS hero h5.3.x

References

https://www.qnap.com/en/security-advisory/qsa-25-50

CVSS V4

Score:
4.6
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

coral
.