CVE-2026-34838

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.156, 25.0.90, and 26.0.12, a vulnerability in the AbstractSettingsCollection model leads to insecure deserialization when these settings are loaded. By injecting a serialized FileCookieJar object into a setting string, an authenticated attacker can achieve Arbitrary File Write, leading directly to Remote Code Execution (RCE) on the server. This issue has been patched in versions 6.8.156, 25.0.90, and 26.0.12.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/Intermesh/groupoffice/releases/tag/v25.0.90	Release Notes
https://github.com/Intermesh/groupoffice/releases/tag/v26.0.12	Release Notes
https://github.com/Intermesh/groupoffice/releases/tag/v6.8.156	Release Notes
https://github.com/Intermesh/groupoffice/security/advisories/GHSA-h22j-frrf-5vxq	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:intermesh:group-office::::::::
	cpe:2.3:a:intermesh:group-office::::::::
	cpe:2.3:a:intermesh:group-office::::::::

History

No history.

Information

Published : 2026-04-02 20:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-34838

Mitre link : CVE-2026-34838

CVE.ORG link : CVE-2026-34838

JSON object : View

Products Affected

intermesh

group-office

CWE

CWE-502

Deserialization of Untrusted Data

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