High severity · published Feb 2, 2026
CVE-2026-25134
Group-Office Argument Injection in MaintenanceController::actionZipLanguage
8.8
CVSS
0.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
groupoffice · Intermesh
< 6.8.150; >= 25.0.0, < 25.0.82; >= 26.0.0, < 26.0.5 · source: vendor
GO
Group Office · Group-office
before 6.8.150; 25.0.1 before 25.0.82; 26.0.1 before 26.0.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25134
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-25134
Patch
https://github.com/Intermesh/groupoffice/commit/d28490a6a29936db7888aa841ab8ade88800540b
Exploit
https://github.com/Intermesh/groupoffice/security/advisories/GHSA-v39j-549w-8849
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