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TI-2025-32893 Aliases CVE-2025-52856GHSA-fjh8-m5r5-9wrm

Improper authentication in QNAP VioStor

Priority MEDIUM 49CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

An improper authentication vulnerability has been reported to affect VioStor. If a remote attacker, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: VioStor 5.1.6 build 20250621 and later

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00656 51st percentileScored 2026-11-07
Fix Fixed VioStor (QNAP Systems Inc.): 5.1.6 build 20250621

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
QNAPVioStor5.1.0 to before 5.1.6 build 202506215.1.6 build 20250621Patch availableCNA
  • VioStor VendorQNAP Affected 5.1.0 to before 5.1.6 build 20250621 Fixed in 5.1.6 build 20250621 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:qnap:qvr:*:*:*:*:*:*:*:*5.1.0 to before 5.1.6VulnerableQNAP
cpe:2.3:a:qnap:qvr:5.1.6:-:*:*:*:*:*:*5.1.6VulnerableQNAP
  • cpe:2.3:a:qnap:qvr:*:*:*:*:*:*:*:* Versions 5.1.0 to before 5.1.6 Vulnerable ·QNAP
  • cpe:2.3:a:qnap:qvr:5.1.6:-:*:*:*:*:*:* Versions 5.1.6 Vulnerable ·QNAP

Remediation

  • Fix · CNA VioStor (QNAP Systems Inc.) Fixed in 5.1.6 build 20250621

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    QNAP Systems VioStor 5.1.6 build 20250621

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-52856
  2. 2026-10-03 Alias added: GHSA-fjh8-m5r5-9wrm
  3. 2026-10-13 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2022-10579 Vulnerability in QVR CVSS 3.1CRITICAL 9.8
  • TI-2021-16256 Command Injection Vulnerability in VioStor CVSS 3.1CRITICAL 9.8
  • TI-2021-13392 Command Injection Vulnerability in QVR CVSS 3.1CRITICAL 9.8
  • TI-2021-13391 Command Injection Vulnerability in QVR CVSS 3.1CRITICAL 9.8
  • TI-2021-13389 Command Injection Vulnerability in QVR CVSS 3.1CRITICAL 9.8
  • TI-2021-16257 Improper Authentication Vulnerability in VioStor CVSS 3.1HIGH 8.8
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences