CVE-2025-66280

Description

An integer overflow or wraparound 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 compromise the security of the system. We have already fixed the vulnerability in the following versions: QTS 5.2.9.3410 build 20260214 and later QuTS hero h5.2.9.3410 build 20260214 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3397 build 20260206 and later

PUBLISHED Reserved 2025-11-26 | Published 2026-06-10 | Updated 2026-06-10 | Assigner qnap

Problem types

CWE-190

CWE-121

Product status

Credits

Bechir Bouali (@b3ch1r) from SecLab - TII finder

References

www.qnap.com/en/security-advisory/qsa-26-10

cve.org (CVE-2025-66280)

nvd.nist.gov (CVE-2025-66280)

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