CVE-2026-27947
HIGH WAF: Medium
CVSS 8.8
Published: 2026-02-27
CWE-434
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.
WAF Coverage Analysis
Unrestricted File Upload
Medium WAF Coverage
OWASP: A04:2021 Insecure Design
930xxx - Local File Inclusion
Affected Software
| Vendor | Product | Version |
|---|---|---|
| intermesh | group-office | up to 6.8.154 |
| intermesh | group-office | 25.0.1 - 25.0.87 |
| intermesh | group-office | 26.0.1 - 26.0.9 |
References
- github.com (Vendor Advisory)