EUVD-2026-18532
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
3Tags
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.
Analysis
Remote Code Execution in Group-Office enterprise CRM via insecure deserialization allows authenticated attackers to write arbitrary files and execute code on the server. Affects all versions prior to 6.8.156, 25.0.90, and 26.0.12 across multiple product branches. …
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Remediation
Within 24 hours: Identify all Group-Office installations and their current versions; isolate any instances accessible from untrusted networks pending remediation. Within 7 days: Upgrade to patched versions (6.8.156, 25.0.90, or 26.0.12 depending on branch) after testing in non-production; verify no unauthorized access logs or file modifications. …
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External POC / Exploit Code
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