Information Exposure Through an Error Message in desktop - CVE-2025-66549
Published: December 8, 2025
Vulnerability identifier: #VU119264
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-66549
CWE-ID: CWE-209
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Nextcloud
Affected software:
desktop
desktop
Detailed vulnerability description
The vulnerability allows a remote user to gain access to potentially sensitive information.
The vulnerability exists due to an error within desktop client when attempting to lock a file inside a end-to-end encrypted directory. A remote administrator can gain unauthorized access to sensitive information on the system.
How to mitigate CVE-2025-66549
Install updates from vendor's website.