RCE in Group-Office Group Office

CVE-2026-25512

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.

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.038 (89.9th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-25512: fell from 0.185 to 0.038.

EPSS over last 30 days · oldest: 0.185 · newest: 0.038 · change: -0.147

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-25512?
CVE-2026-25512 is a high-severity vulnerability in Group-Office Group Office, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-02-04.
How severe is CVE-2026-25512?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2026-25512 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.