CVE-2026-27947 — Group-Office Vulnerable to Remote Code Execution (RCE)

Description (CNA)

Group-Office is an enterprise customer relationship management and groupware tool. Versions prior to 26.0.9, 25.0.87, and 6.8.154 have an authenticated Remote Code Execution vulnerability in the TNEF attachment processing flow. The vulnerable path extracts attacker-controlled files from `winmail.dat` and then invokes `zip` with a shell wildcard (`*`). Because extracted filenames are attacker-controlled, they can be interpreted as `zip` options and lead to arbitrary command execution. Versions 26.0.9, 25.0.87, and 6.8.154 fix the issue.

Affected (CNA)

Vendor / product	Versions
Intermesh / groupoffice	affected >= 26.0.0, < 26.0.9; affected >= 25.0.0, < 25.0.87; affected < 6.8.154

CWE

CWE-88, CWE-434

References

https://github.com/Intermesh/groupoffice/security/advisories/GHSA-2rwh-9qp7-f92x

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.