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CVE-2026-25512

Group-office Group Office remote code execution

8.8 HIGHPublic exploitEPSS 3.81%
  1. Published4 Feb 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Group-office Group Office≥ 25.0.1 < 25.0.82 · ≥ 26.0.1 < 26.0.5 · < 6.8.150

Remediation

Fixed in
Group-office Group Office≥ 25.0.82

References

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Frequently asked

Is CVE-2026-25512 being actively exploited?

CVE-2026-25512 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 3.81%.

How severe is CVE-2026-25512?

CVE-2026-25512 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 3.81% probability of exploitation.

Which products are affected by CVE-2026-25512?

Affected products include Group-office Group Office.

How do I fix CVE-2026-25512?

Upgrade affected software to a fixed version, for example Group-office Group Office 25.0.82 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-25512 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.