CVE-2025-66549
2.4 · LOWOverview
CVE-2025-66549 is a low-severity vulnerability affecting nextcloud desktop. It was published on December 5, 2025 and has a CVSS 3.1 base score of 2.4 (LOW).
This vulnerability has a CVSS 3.1 base score of 2.4, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
Nextcloud Desktop is the desktop sync client for Nextcloud. Prior to 3.16.5, when trying to manually lock a file inside an end-to-end encrypted directory, the path of the file was sent to the server unencrypted, making it possible for administrators to see it in log files. This vulnerability is fixed in 3.16.5.
Remediation
Check the references section for vendor advisories and patches from nextcloud. Update desktop 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 |
|---|---|---|---|
| nextcloud | desktop | >= 3.0.0, < 3.16.5 | Affected |
Frequently Asked Questions
What is CVE-2025-66549?
CVE-2025-66549 is a low-severity vulnerability affecting nextcloud desktop. It was published on December 5, 2025 and has a CVSS 3.1 base score of 2.4 (LOW).
How severe is CVE-2025-66549?
This vulnerability has a CVSS 3.1 base score of 2.4, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2025-66549?
Check the references section for vendor advisories and patches from nextcloud. Update desktop 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-2025-66549?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-66549 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
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