CVE-2026-34838Group-Office is an enterprise customer relationship management and groupware tool.
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It affects intermesh group-office. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 9.9 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-502
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
intermesh group-office intermesh:group-office | before 6.8.156; from 25.0.1 before 25.0.90; from 26.0.1 before 26.0.12 | NVD |
References
- https://github.com/Intermesh/groupoffice/releases/tag/v25.0.90release-notes
- https://github.com/Intermesh/groupoffice/releases/tag/v26.0.12release-notes
- https://github.com/Intermesh/groupoffice/releases/tag/v6.8.156release-notes
- https://github.com/Intermesh/groupoffice/security/advisories/GHSA-h22j-frrf-5vxqvendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.