CVE-2026-25134
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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4Tags
Description
Group-Office is an enterprise customer relationship management and groupware tool. Prior to 6.8.150, 25.0.82, and 26.0.5, the MaintenanceController exposes an action zipLanguage which takes a lang parameter and passes it directly to a system zip command via exec(). This can be combined with uploading a crafted zip file to achieve remote code execution. This vulnerability is fixed in 6.8.150, 25.0.82, and 26.0.5.
Analysis
Remote code execution in Group Office versions prior to 6.8.150, 25.0.82, and 26.0.5 allows authenticated attackers to execute arbitrary commands through unsanitized language parameters passed to system zip operations in the MaintenanceController. The vulnerability can be exploited by combining a crafted zip file upload with command injection, and public exploit code exists. …
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Remediation
Within 24 hours: Identify all Group-Office instances and their versions; immediately disable or restrict access to the MaintenanceController zipLanguage action via network controls or Web Application Firewall rules. Within 7 days: Upgrade all affected installations to patched versions (6.8.150, 25.0.82, or 26.0.5 or later). …
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