NULL pointer dereference in QuTS hero and QNAP QTS - CVE-2025-53596
Published: January 5, 2026
Vulnerability identifier: #VU120939
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-53596
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error. A remote administrator can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Affected software
QuTS hero
QNAP QTS
QNAP QTS
How to mitigate CVE-2025-53596
Install updates from vendor's website.
QuTS hero - addressed in versions h5.2.7.3256 build 20250913, h5.3.1.3250 build 20250912
QNAP QTS - update to 5.2.7.3256 20250913
QNAP QTS - update to 5.2.7.3256 20250913