CVE-2026-27947
High
Description
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductIntermesh Group-office
PublishedFeb 27, 2026
First seenFeb 27, 2026
How to fix
Update
- intermesh group-office6.8.154, 25.0.87, 26.0.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| intermesh group-office | v < 6.8.154, 25.0.1 ≤ v < 25.0.87, 26.0.1 ≤ v < 26.0.9 | 6.8.154, 25.0.87, 26.0.9 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.