CVE-2025-52864: A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote…
CVE-2025-52864 · Severity: high · CVSS 8.1 · Published 2026-01-02
A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user 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 h5.3.0.3192 build 20250716 and later
No. Junglewise Threat Intelligence has no report of CVE-2025-52864 being exploited in the wild.
How severe is CVE-2025-52864?
High severity, with a CVSS score of 8.1, published 2 January 2026.
Which products and versions are affected?
QNAP QTS, QNAP Quts Hero. The advisory does not name versions.
Is there a fix for CVE-2025-52864?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-52864?
Check whether you run QNAP QTS or QNAP Quts Hero. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.