This vulnerability (CVE-2025-59381) is a path traversal flaw (CWE-22) in QNAP QTS operating systems. It permits a remote attacker who already has administrator access to exploit the flaw to read files outside the intended directories, potentially exposing sensitive system data. The vulnerability affects QTS 5.2.0 and related QuTS hero versions prior to the fixed builds. The vendor has released official patches in QTS 5.2.8.3332 build 20251128 and later, QuTS hero h5.2.8.3321 build 20251117 and later, and QuTS hero h5.3.2.3354 build 20251225 and later to address this issue.

An attacker with administrator privileges can exploit this vulnerability to read arbitrary files on the affected system, potentially exposing sensitive system or configuration data. This could lead to information disclosure but requires prior administrative access, limiting the scope of exploitation.

Apply the official patches released by QNAP in QTS 5.2.8.3332 build 20251128 and later, QuTS hero h5.2.8.3321 build 20251117 and later, or QuTS hero h5.3.2.3354 build 20251225 and later. Upgrading to these fixed versions will remediate the vulnerability. No other mitigation or workaround is indicated by the vendor advisory.