CVE-2026-34838
CRITICALGroup-Office: Authenticated Remote Code Execution via PHP Insecure Deserialization in `AbstractSettingsCollection`
Title source: cnaDescription
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.
Exploits (1)
References (4)
Scores
CVSS v3
9.9
EPSS
0.0069
EPSS Percentile
71.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Details
CWE
CWE-502
Status
published
Products (4)
intermesh/group-office
< 6.8.156
Intermesh/groupoffice
< 25.0.90
Intermesh/groupoffice
< 26.0.12
Intermesh/groupoffice
< 6.8.156
Published
Apr 02, 2026
Tracked Since
Apr 03, 2026