CVE-2026-34838
CVE-2026-34838
9.9
CriticalPublished:
Last updated:
Source:security-advisories@github.com
Analyzed
Weakness (CWE)
CVSS Vector
v3.1- Attack Vector
- Network
- Attack Complexity
- Low
- Privileges Required
- Low
- User Interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Description
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.
References
security-advisories@github.com
https://github.com/Intermesh/groupoffice/releases/tag/v25.0.90security-advisories@github.com
https://github.com/Intermesh/groupoffice/releases/tag/v26.0.12security-advisories@github.com
https://github.com/Intermesh/groupoffice/releases/tag/v6.8.156security-advisories@github.com
https://github.com/Intermesh/groupoffice/security/advisories/GHSA-h22j-frrf-5vxq