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.
History

Wed, 04 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:intermesh:group-office:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


Tue, 03 Mar 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 02 Mar 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Intermesh
Intermesh group-office
Vendors & Products Intermesh
Intermesh group-office

Fri, 27 Feb 2026 20:15:00 +0000

Type Values Removed Values Added
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.
Title Group-Office Vulnerable to Remote Code Execution (RCE)
Weaknesses CWE-434
CWE-88
References
Metrics cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-27T19:52:41.592Z

Updated: 2026-03-03T20:24:32.730Z

Reserved: 2026-02-25T03:11:36.690Z

Link: CVE-2026-27947

cve-icon Vulnrichment

Updated: 2026-03-03T20:24:27.720Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-27T20:21:40.513

Modified: 2026-03-04T16:07:30.840

Link: CVE-2026-27947

cve-icon Redhat

No data.