What is the CVSS score of CVE-2026-25134?

CVE-2026-25134 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Group Office are affected by CVE-2026-25134?

Group-Office installations prior to versions 6.8.150, 25.0.82, and 26.0.5 contain a critical remote code execution vulnerability in the maintenance controller that allows attackers to execute…. A patch is available.

Is there a public PoC exploit available for CVE-2026-25134?

Yes, a public proof-of-concept exploit is available for CVE-2026-25134. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-25134?

Within 24 hours: Identify all Group-Office instances and their versions; immediately disable or restrict access to the MaintenanceController zipLanguage action via network controls or Web Application Firewall rules. Within 7 days: Upgrade all affected installations to patched versions (6.8.150, 25.0.82, or 26.0.5 or later). Within 30 days: Conduct full security audit of affected systems for signs of exploitation; review access logs for suspicious maintenance controller activity and implement principle of least privilege for maintenance functions.

Group Office CVE-2026-25134

HIGH

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') (CWE-88)

2026-02-02 security-advisories@github.com

RCE Group Office

8.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:01 vuln.today

PoC Detected

Feb 18, 2026 - 17:35 vuln.today

Public exploit code

Patch released

Feb 18, 2026 - 17:35 nvd

Patch available

CVE Published

Feb 02, 2026 - 23:16 nvd

HIGH 8.8

DescriptionGitHub Advisory

Group-Office is an enterprise customer relationship management and groupware tool. Prior to 6.8.150, 25.0.82, and 26.0.5, the MaintenanceController exposes an action zipLanguage which takes a lang parameter and passes it directly to a system zip command via exec(). This can be combined with uploading a crafted zip file to achieve remote code execution. This vulnerability is fixed in 6.8.150, 25.0.82, and 26.0.5.

AnalysisAI

Remote code execution in Group Office versions prior to 6.8.150, 25.0.82, and 26.0.5 allows authenticated attackers to execute arbitrary commands through unsanitized language parameters passed to system zip operations in the MaintenanceController. The vulnerability can be exploited by combining a crafted zip file upload with command injection, and public exploit code exists. Update to patched versions immediately.

Technical ContextAI

Affects Group Office. Group-Office is an enterprise customer relationship management and groupware tool. Prior to 6.8.150, 25.0.82, and 26.0.5, the MaintenanceController exposes an action zipLanguage which takes a lang parameter and passes it directly to a system zip command via exec(). This can be combined with uploading a crafted zip file to achieve remote code execution. This vulnerability is fixed in 6.8.150, 25.0.82, and 26.0.5.