CVE-2026-25512CWE-78

Group-Office is vulnerable to RCE due to Command Injection via TNEF Attachment Handler

Critical · published February 4, 2026

CVSS v4.0
9.4
EPSS
4%
Percentile
90.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.4 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
0.03813 · 90.0th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-02-04T20:39Z
EPSS history
Timeline
  • 25 SEP 03:25Z
    EPSS moved 19% → 3%
    epss
  • 04 FEB 20:39Z
    Group-Office is vulnerable to RCE due to Command Injection via TNEF Attachment Handler
    cvelistv5