CVE-2025-53591

A use of externally-controlled format string 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 obtain secret data or modify memory.

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 h5.3.1.3250 build 20250912 and later