CVE-2025-52856 is a critical improper authentication vulnerability affecting QNAP VioStor NVR systems, specifically versions prior to 5.1.6 build 20250621. This flaw allows a remote attacker to bypass authentication, potentially leading to full system compromise with high impact on confidentiality, integrity, and availability. Rated with a CVSS score of 9.8 (CRITICAL), it requires no user interaction or complex attack conditions. While no public exploit code or active exploitation has been confirmed, the vulnerability has garnered some community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 5.1.0, < 5.1.6CPE matchmatch criteria | cpe:2.3:a:qnap:qvr:*:*:*:*:*:*:*:* | ||
5.1.6CPE matchmatch criteria | cpe:2.3:a:qnap:qvr:5.1.6:-:*:*:*:*:*:* |
CVSS version used by this source: 4.0
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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.