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CVE-2026-25512— Group-Office is vulnerable to RCE due to Command Injection via TNEF Attachment Handler

Quick assessment

Affected
Intermesh groupoffice
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Group Office是荷兰Group Office公司的一款模块化的办公套件。 Group Office 6.8.150之前版本、25.0.82之前版本和26.0.5之前版本存在操作系统命令注入漏洞，该漏洞源于email/message/tnefAttachmentFromTempFile端点对用户控制的参数拼接不当，可能导致远程命令执行。

AI Predicted 8.1 Difficulty: Easy EPSS 3.81% · P90

Public Exploits 1

Nuclei · 1 CVE-2026-25512.yaml [template]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-25512

Vulnerability Information
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Vulnerability Title
Group-Office is vulnerable to RCE due to Command Injection via TNEF Attachment Handler
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Group Office 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Group Office是荷兰Group Office公司的一款模块化的办公套件。 Group Office 6.8.150之前版本、25.0.82之前版本和26.0.5之前版本存在操作系统命令注入漏洞，该漏洞源于email/message/tnefAttachmentFromTempFile端点对用户控制的参数拼接不当，可能导致远程命令执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Intermesh groupoffice < 6.8.150 -

II. Public POCs for CVE-2026-25512

# POC Description Source Link Shenlong Link
1 RCE - Command Injection via TNEF Attachment Handler https://github.com/NumberOreo1/CVE-2026-25512 POC Details
2 None https://github.com/mbanyamer/CVE-2026-25512-PoC-Group-Office-Authenticated-RCE POC Details
3 Group-Office before versions 6.8.150, 25.0.82, and 26.0.5 is vulnerable to remote code execution via OS command injection. 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. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-25512.yaml POC Details
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III. Intelligence Information for CVE-2026-25512

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IV. Related Vulnerabilities

Same product: groupoffice
Same vendor: Intermesh
Same weakness: CWE-78

V. Comments for CVE-2026-25512

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