CVE-2026-25512: Group-Office is an enterprise customer relationship management and groupware tool

Q: How do I fix CVE-2026-25512?

group office: upgrade to 6.8.150, 25.0.82, 26.0.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-25512 being exploited?

CVE-2026-25512 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-25512 affect?

CVE-2026-25512 affects group office. Severity is high (CVSS 8.8). 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/tnefAttachme

Q: How urgent is CVE-2026-25512?

Priority 63/100. High severity; EPSS top 3%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact

This week

HIGH 8.8UPGRADE

CVE-2026-25512 is a high-severity flaw (CVSS 8.8) affecting group office. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
EPSS top 3%: very likely to be exploited
Public exploit reference
CISA SSVC: automatable with total technical impact

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	20.1% (top 3%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-02-04
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: group-office

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-04 21:16 UTCPublished CVE record published
2026-06-17 10:24 UTCUpdated Record last modified

group-office group office UPGRADE

Affected: < 6.8.150 · >= 25.0.1 and < 25.0.82 · >= 26.0.1 and < 26.0.5

Fixed in: 6.8.150, 25.0.82, 26.0.5

Safe to downgrade to: a release before 25.0.1

1. Check installed version

apt-cache policy group-office || rpm -q group-office || group-office --version

2. UPGRADE to 6.8.150 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade group-office

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade group-office

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 25.0.1 (Debian / Ubuntu)

apt-cache madison group-office sudo apt install group-office=<VERSION_BEFORE_25.0.1> sudo apt-mark hold group-office

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list group-office sudo dnf downgrade group-office-<VERSION_BEFORE_25.0.1> sudo dnf versionlock add group-office

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · proftpd · FIXED · 1.3.9e-2.fc46 · FEDORA-2026-fcb0a25c2f · source

sudo dnf upgrade --advisory=FEDORA-2026-fcb0a25c2f

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: NumberOreo1/CVE-2026-25512 (0 stars)
GitHub PoC: mbanyamer/CVE-2026-25512-PoC-Group-Office-Authenticated-RCE (0 stars)
Nuclei scan template: Group-Office < 26.0.5 - Remote Code Execution

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-25512?

group office: upgrade to 6.8.150, 25.0.82, 26.0.5. Exact commands for each OS are on this page.

Is CVE-2026-25512 being exploited?

CVE-2026-25512 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-25512 affect?

CVE-2026-25512 affects group office. Severity is high (CVSS 8.8). 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/tnefAttachme

How urgent is CVE-2026-25512?

Priority 63/100. High severity; EPSS top 3%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact

Related CVEs

CVE-2026-25511 MEDIUM 4.9 UPGRADE Group-Office is an enterprise customer relationship management and groupware tool
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CVE-2025-63406 HIGH 8.8 UPGRADE An issue in Intermesh BV GroupOffice vulnerable before v.25.0.47 and 6.8.136 allows a remote attacker to execu
CVE-2025-53505 MEDIUM 5.3 UPGRADE Group-Office versions prior to 6.8.119 and prior to 25.0.20 provided by Intermesh BV contain a path traversal

References

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