Intermesh GroupOffice up to 6.8.149/25.0.81/26.0.4 Endpoint tnefAttachmentFromTempFile exec os command injection

Summaryinfo

A vulnerability classified as critical has been found in Intermesh GroupOffice up to 6.8.149/25.0.81/26.0.4. Affected by this vulnerability is the function exec of the file email/message/tnefAttachmentFromTempFile of the component Endpoint. The manipulation leads to os command injection. This vulnerability is traded as CVE-2026-25512. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Intermesh GroupOffice up to 6.8.149/25.0.81/26.0.4 and classified as critical. This issue affects the function exec of the file email/message/tnefAttachmentFromTempFile of the component Endpoint. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-25512 since 02/02/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Upgrading to version 6.8.150, 25.0.82 or 26.0.5 eliminates this vulnerability. Applying the patch 6c612deca97a6cd2a1bd4feea0ce7e8e9d907792 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• Intermesh

Name

• GroupOffice

Version

• 6.8.149
• 25.0.0
• 25.0.1
• 25.0.2
• 25.0.3
• 25.0.4
• 25.0.5
• 25.0.6
• 25.0.7
• 25.0.8
• 25.0.9
• 25.0.10
• 25.0.11
• 25.0.12
• 25.0.13
• 25.0.14
• 25.0.15
• 25.0.16
• 25.0.17
• 25.0.18
• 25.0.19
• 25.0.20
• 25.0.21
• 25.0.22
• 25.0.23
• 25.0.24
• 25.0.25
• 25.0.26
• 25.0.27
• 25.0.28
• 25.0.29
• 25.0.30
• 25.0.31
• 25.0.32
• 25.0.33
• 25.0.34
• 25.0.35
• 25.0.36
• 25.0.37
• 25.0.38
• 25.0.39
• 25.0.40
• 25.0.41
• 25.0.42
• 25.0.43
• 25.0.44
• 25.0.45
• 25.0.46
• 25.0.47
• 25.0.48
• 25.0.49
• 25.0.50
• 25.0.51
• 25.0.52
• 25.0.53
• 25.0.54
• 25.0.55
• 25.0.56
• 25.0.57
• 25.0.58
• 25.0.59
• 25.0.60
• 25.0.61
• 25.0.62
• 25.0.63
• 25.0.64
• 25.0.65
• 25.0.66
• 25.0.67
• 25.0.68
• 25.0.69
• 25.0.70
• 25.0.71
• 25.0.72
• 25.0.73
• 25.0.74
• 25.0.75
• 25.0.76
• 25.0.77
• 25.0.78
• 25.0.79
• 25.0.80
• 25.0.81
• 26.0.0
• 26.0.1
• 26.0.2
• 26.0.3
• 26.0.4

License

• open-source

Website

• Product: https://github.com/Intermesh/groupoffice/

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