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CVE-2024-27442: An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0

34
Routine
HIGH 7.8UPGRADE

CVE-2024-27442 is a high-severity flaw (CVSS 7.8) affecting collaboration. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. The zmmailboxdmgr binary, a component of ZCS, is intended to be executed by the zimbra user with root privileges for specific mailbox operations. However, an attacker can escalate privileges from the zimbra user to root, because of improper handling of input arguments. An attacker can execute arbitrary commands with elevated privileges, leading to local privilege escalation.

Why this priority

  • High severity

A fixed release or distro patch exists.

Risk facts

CVSS score7.8 (High)
Attack vectorLocal
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.3% (top 71%)
CISA exploited listNo
WeaknessCWE-755, CWE-269
Published2024-08-12
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: zimbra

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

Am I affected?

Timeline

zimbra collaboration UPGRADE
Affected: >= 10.0.0 and < 10.0.7 · 9.0.0 · 9.0.0 p0 · 9.0.0 p1 · 9.0.0 p10 · 9.0.0 p11 · 9.0.0 p12 · 9.0.0 p13
Fixed in: 10.0.7
Safe to downgrade to: a release before 9.0.0
1. Check installed version
apt-cache policy collaboration || rpm -q collaboration || collaboration --version
2. UPGRADE to 10.0.7 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade collaboration
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade collaboration
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 9.0.0 (Debian / Ubuntu)
apt-cache madison collaboration sudo apt install collaboration=<VERSION_BEFORE_9.0.0> sudo apt-mark hold collaboration
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list collaboration sudo dnf downgrade collaboration-<VERSION_BEFORE_9.0.0> sudo dnf versionlock add collaboration
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-2024-27442?

collaboration: upgrade to 10.0.7. Exact commands for each OS are on this page.

Is CVE-2024-27442 being exploited?

CVE-2024-27442 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-2024-27442 affect?

CVE-2024-27442 affects collaboration. Severity is high (CVSS 7.8). An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. The zmmailboxdmgr binary, a component of ZCS, is intended to be executed by the zimbra user with root privileges for specific mailbox operations. However, an attacker can e

How urgent is CVE-2024-27442?

Priority 34/100. High severity

Software pages

Zimbra vulnerabilities

Related CVEs

References

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