High severity · published Feb 4, 2026
CVE-2026-25512
Group-Office is vulnerable to RCE due to Command Injection via TNEF Attachment Handler
8.8
CVSS
20.1%
EPSS
No
On KEV
Description
Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.150, 25.0.82, and 26.0.5, there is a remote code execution (RCE) vulnerability in Group-Office. The endpoint email/message/tnefAttachmentFromTempFile directly concatenates the user-controlled parameter tmp_file into an exec() call. By injecting shell metacharacters into tmp_file, an authenticated attacker can execute arbitrary system commands on the server. This issue has been patched in versions 6.8.150, 25.0.82, and 26.0.5.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)20.1% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
groupoffice · Intermesh
< 6.8.150; < 25.0.82; < 26.0.5 · source: vendor
GO
Group Office · Group-office
before 6.8.150; 25.0.1 before 25.0.82; 26.0.1 before 26.0.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25512
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-25512
Patch
http://github.com/Intermesh/groupoffice/commit/6c612deca97a6cd2a1bd4feea0ce7e8e9d907792
Exploit
https://github.com/Intermesh/groupoffice/security/advisories/GHSA-579w-jvg7-frr4
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