TI-2026-20296 Aliases CVE-2026-25134

Group-Office Argument Injection in MaintenanceController::actionZipLanguage

MEDIUM 44CWE-88Published 2026-02-02 · Updated 2026-02-04

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-88.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00886 59th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed groupoffice (Intermesh): 6.8.150, 25.0.82, 26.0.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Intermesh	groupoffice	before 6.8.150; 25.0.0 to before 25.0.82; 26.0.0 to before 26.0.5	6.8.150, 25.0.82, 26.0.5	Patch available	CNA

groupoffice VendorIntermesh Affected before 6.8.150; 25.0.0 to before 25.0.82; 26.0.0 to before 26.0.5 Fixed in 6.8.150, 25.0.82, 26.0.5 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:group-office:group_office::::::::	before 6.8.150; 25.0.1 to before 25.0.82; 26.0.1 to before 26.0.5	Vulnerable	Group-office

cpe:2.3:a:group-office:group_office:*:*:*:*:*:*:*:* Versions before 6.8.150; 25.0.1 to before 25.0.82; 26.0.1 to before 26.0.5 Vulnerable ·Group-office

Remediation

Fix · CNA groupoffice (Intermesh) Fixed in 6.8.150, 25.0.82, 26.0.5

Timeline

2026-10-02 Threatist record created from CVE-2026-25134

References

Exploit 1

https://github.com/Intermesh/groupoffice/security/advisories/GHSA-v39j-549w-8849

Patch 1

https://github.com/Intermesh/groupoffice/commit/d28490a6a29936db7888aa841ab8ade88800540b

TI-2026-20622 Group-Office is vulnerable to RCE due to Command Injection via TNEF Attachment Handler CVSS 4.0CRITICAL 9.4
TI-2018-16194 Path traversal in Intermesh Group-Office lets attackers read files CVSS 4.0HIGH 8.7
TI-2026-20621 Group-Office is vulnerable to SSRF and File Read in WOPI service discovery CVSS 4.0HIGH 8.2
TI-2023-25213 Server-Side Request Forgery in groupoffice CVSS 3.1HIGH 8.8
TI-2025-30692 GroupOffice's Blind Stored XSS in Phone Number Field Enables Forced Redirect and Unauthorized Actions CVSS 4.0MEDIUM 6.9
TI-2025-18860 Group-Office has a Stored XSS Vulnerability via user's name field CVSS 4.0MEDIUM 6.9

See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences