CVEvulnerability
CVE-2026-34838
9.9 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2026-04-02
- Last modified
- 2026-07-24
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.9 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-502
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.
Affected configurations
• intermesh group-office (< 6.8.156)
• intermesh group-office (>= 25.0.1 < 25.0.90)
• intermesh group-office (>= 26.0.1 < 26.0.12)
Related
Weakness · CWE (1)
- CWE-502 Deserialization of Untrusted Data weakness
References
- 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