Arbitrary file upload in Group Office - CVE-2026-27947
Published: March 2, 2026
Vulnerability identifier: #VU123350
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-27947
CWE-ID: CWE-434
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Intermesh BV
Affected software:
Group Office
Group Office
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to insufficient validation of file during file upload in the TNEF attachment processing flow. A remote user can upload a malicious file and execute it on the server.
How to mitigate CVE-2026-27947
Install updates from vendor's website.