What is the CVSS score of CVE-2026-25512?

CVE-2026-25512 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 13.5%.

Which versions of Group Office are affected by CVE-2026-25512?

Group-Office installations are vulnerable to remote code execution attacks that could allow attackers to gain complete control of affected systems without authentication.. A patch is available.

Is there a public PoC exploit available for CVE-2026-25512?

Yes, a public proof-of-concept exploit is available for CVE-2026-25512. Prioritise patching immediately. EPSS: 13.5%.

How to fix or mitigate CVE-2026-25512?

Within 24 hours: Identify all Group-Office instances in your environment and document current versions; isolate any internet-facing deployments or restrict access to trusted networks only. Within 7 days: Apply vendor patches to all affected systems (upgrade to versions 6.8.150, 25.0.82, 26.0.5 or later) and validate successful patching. Within 30 days: Conduct security audit of affected systems for signs of prior exploitation and implement additional network segmentation to limit Group-Office exposure.

Group Office CVE-2026-25512

HIGH

OS Command Injection (CWE-78)

2026-02-04 security-advisories@github.com

RCE Group Office

8.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 11, 2026 - 19:15 vuln.today

Public exploit code

Patch released

Feb 11, 2026 - 19:15 nvd

Patch available

CVE Published

Feb 04, 2026 - 21:16 nvd

HIGH 8.8

DescriptionGitHub Advisory

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.

AnalysisAI

Authenticated attackers can execute arbitrary commands on Group-Office servers through unsanitized user input in the email attachment endpoint, where shell metacharacters are directly passed to system execution functions. The vulnerability affects Group-Office versions prior to 6.8.150, 25.0.82, and 26.0.5, and public exploit code exists. Organizations should apply available patches immediately as this is actively exploitable by authenticated users.

Technical ContextAI

Classified as CWE-78 (OS Command Injection). Affects the Group-Office. The component of Group Office. 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 vers