CVE-2026-25134: Group-Office is an enterprise customer relationship management and groupware tool

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HIGH 8.8UPGRADE

CVE-2026-25134 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 6.8.150, 25.0.82, and 26.0.5, the MaintenanceController exposes an action zipLanguage which takes a lang parameter and passes it directly to a system zip command via exec(). This can be combined with uploading a crafted zip file to achieve remote code execution. This vulnerability is fixed in 6.8.150, 25.0.82, and 26.0.5.

Why this priority

High severity
Public exploit reference

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	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-88
Published	2026-02-02
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

2026-02-02 23:16 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.

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-2026-25134?

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

Is CVE-2026-25134 being exploited?

CVE-2026-25134 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-2026-25134 affect?

CVE-2026-25134 affects group office. Severity is high (CVSS 8.8). Group-Office is an enterprise customer relationship management and groupware tool. Prior to 6.8.150, 25.0.82, and 26.0.5, the MaintenanceController exposes an action zipLanguage which takes a lang parameter and passes it directly to a syste

How urgent is CVE-2026-25134?

Priority 51/100. High severity; Public exploit reference

Related CVEs

CVE-2026-25512 HIGH 8.8 UPGRADE Group-Office is an enterprise customer relationship management and groupware tool
CVE-2026-25511 MEDIUM 4.9 UPGRADE Group-Office is an enterprise customer relationship management and groupware tool
CVE-2026-23887 MEDIUM 5.4 UPGRADE Group-Office is an enterprise customer relationship management and groupware tool
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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