Intermesh groupoffice up to 6.8.153/25.0.86/26.0.8 argument injection

Summaryinfo

A vulnerability was found in Intermesh groupoffice up to 6.8.153/25.0.86/26.0.8. It has been classified as critical. Impacted is an unknown function. This manipulation causes argument injection. The identification of this vulnerability is CVE-2026-27947. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Intermesh groupoffice up to 6.8.153/25.0.86/26.0.8. It has been declared as critical. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a argument injection vulnerability. The CWE definition for the vulnerability is CWE-88. The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Group-Office is an enterprise customer relationship management and groupware tool. Versions prior to 26.0.9, 25.0.87, and 6.8.154 have an authenticated Remote Code Execution vulnerability in the TNEF attachment processing flow. The vulnerable path extracts attacker-controlled files from `winmail.dat` and then invokes `zip` with a shell wildcard (`*`). Because extracted filenames are attacker-controlled, they can be interpreted as `zip` options and lead to arbitrary command execution. Versions 26.0.9, 25.0.87, and 6.8.154 fix the issue.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-27947 since 02/25/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

Upgrading to version 6.8.154, 25.0.87 or 26.0.9 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-9060). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Intermesh

Name

• groupoffice

Version

• 6.8.153
• 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
• 25.0.82
• 25.0.83
• 25.0.84
• 25.0.85
• 25.0.86
• 26.0.0
• 26.0.1
• 26.0.2
• 26.0.3
• 26.0.4
• 26.0.5
• 26.0.6
• 26.0.7
• 26.0.8

Website

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

CPE 2.3info

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Entryinfo

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