CVE-2025-52856
9.8 · CRITICALOverview
CVE-2025-52856 is a critical-severity vulnerability affecting qnap qvr. It was published on August 29, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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
Remediation
Check the references section for vendor advisories and patches from qnap. Update qvr to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| qnap | qvr | >= 5.1.0, < 5.1.6 | Affected |
Frequently Asked Questions
What is CVE-2025-52856?
CVE-2025-52856 is a critical-severity vulnerability affecting qnap qvr. It was published on August 29, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2025-52856?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-52856?
Check the references section for vendor advisories and patches from qnap. Update qvr to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-52856?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-52856 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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