CVE-2026-25512: Group-Office Group Office

High severity, CVSS 8.8. EPSS: 3.8% chance of exploitation in the next 30 days.

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.150, 25.0.82, and 26.0.5, there is a remote code execution (RCE) vulnerability in Group-Office. The endpoint email/message/tnefAttachmentFromTempFile directly concatenates the user-controlled parameter tmp_file into an exec() call. By injecting shell metacharacters into tmp_file, an authenticated attacker can execute arbitrary system commands on the server. This issue has been patched in versions 6.8.150, 25.0.82, and 26.0.5.

Affected products

• Group-Office Group Office: before 6.8.150 (fixed in 6.8.150); from 25.0.1, before 25.0.82 (fixed in 25.0.82); from 26.0.1, before 26.0.5 (fixed in 26.0.5)

Published 2026-02-04. Last modified 2026-06-17.