Improper Authentication in QVR - CVE-2025-52856
Published: September 2, 2025
Vulnerability identifier: #VU114661
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-52856
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: QNAP Systems, Inc.
Affected software:
QVR
QVR
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error when processing authentication requests. A remote attacker can bypass authentication process and gain unauthorized access to the application.
Note: The vulnerability affects the QVR firmware for legacy VioStor NVR.
How to mitigate CVE-2025-52856
Install updates from vendor's website.