External-Controlled Format String Vulnerability in QNAP Operating Systems
CVE-2025-53591

1.2LOW

Key Information:

Vendor

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

What is CVE-2025-53591?

An external-controlled format string vulnerability has been identified in several versions of QNAP operating systems. This flaw allows a remote attacker with administrative privileges to exploit the vulnerability, potentially accessing confidential data or altering memory contents. Users are advised to update to the latest versions to safeguard their systems against potential exploitation.

Affected Version(s)

QTS 5.2.x < 5.2.7.3256 build 20250913

QuTS hero h5.3.x

QuTS hero h5.2.x

References

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

CVSS V4

Score:
1.2
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

coral
.