What is CVE-2026-25134?

CVE-2026-25134 is a high-severity vulnerability in Group-Office Group Office, classified under Argument Injection. CVSS score: 8.8/10. Published 2026-02-02.

How severe is CVE-2026-25134?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Group-Office Group Office

CVE-2026-25134

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.

Published 2026-02-02 · last modified 2026-06-17.

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: 0.009 (58.9th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.001

Affected products

Group-Office Group Office
Intermesh Groupoffice — versions < 6.8.150, >= 25.0.0, < 25.0.82, >= 26.0.0, < 26.0.5

Weakness classification (CWE)

CWE-88 — Argument Injection

References

github.com/Intermesh/groupoffice/security/advisories/GHSA-v39j-549w-8849 (Exploit, Vendor Advisory)
github.com/Intermesh/groupoffice/commit/d28490a6a29936db7888aa841ab8ade88800540b (Patch)

Frequently asked questions

What is CVE-2026-25134?: CVE-2026-25134 is a high-severity vulnerability in Group-Office Group Office, classified under Argument Injection. CVSS score: 8.8/10. Published 2026-02-02.
How severe is CVE-2026-25134?: High severity. CVSS v3 base score is 8.8 out of 10.