← Vulnerability feed

Vulnerability record · CVE-2026-27947 · published 27 February 2026

CVE-2026-27947: Intermesh group-office argument injection vulnerability

Intermesh · Group Office

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.

9.4 CVSS 4.0 Critical EPSS 1.0% · top 37.5% CWE-88 · Argument injectionCWE-434 · Unrestricted file upload
9.4CVSS 4.0 base score
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/Intermesh/groupoffice/security/advisories/GHSA-2rwh-9qp7-f92x Vendor Advisory

Track CVE-2026-27947 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-34838Intermesh group-office deserialization of untrusted data vulnerabilityGroup-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 i…EPSS 0.99%8.8CVE-2026-33755Intermesh group-office sql injection vulnerabilityGroup-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.158, 25.0.92, and 26.0.17, an authenticated …EPSS 0.46%7.5CVE-2010-3428Intermesh group-office sql injection vulnerabilitySQL injection vulnerability in modules/notes/json.php in Intermesh Group-Office 3.5.9 allows remote attackers to execute arbitrary SQL commands via t…EPSS 0.96%7.1CVE-2026-27832Intermesh group-office sql injection vulnerabilityGroup-Office is an enterprise customer relationship management and groupware tool. Versions prior to 26.0.8, 25.0.87, and 6.8.153 have a SQL Injectio…EPSS 0.46%6.9CVE-2025-48366Intermesh group-office cross-site scripting vulnerabilityGroup-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.119 and 25.0.20, a stored and blind XSS vuln…EPSS 0.27%5.8CVE-2025-48368Intermesh group-office cross-site scripting vulnerabilityGroup-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.119 and 25.0.20, a DOM-based Cross-Site Scri…EPSS 0.26%5.3CVE-2025-48993Intermesh group-office cross-site scripting vulnerabilityGroup-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.123 and 25.0.27, a malicious JavaScript payl…EPSS 0.25%5.3CVE-2025-48369Intermesh group-office cross-site scripting vulnerabilityGroup-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.119 and 25.0.20, a persistent Cross-Site Scr…EPSS 0.26%

Source: NIST National Vulnerability Database (record CVE-2026-27947), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.