CVE-2025-26845: An Eval Injection issue was discovered in Znuny through 7.1.3

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CRITICAL 9.8REMOTEUPGRADE

CVE-2025-26845 is a critical-severity flaw (CVSS 9.8) affecting znuny. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An Eval Injection issue was discovered in Znuny through 7.1.3. A user with write access to the configuration file can use this to execute a command executed by the user running the backup.pl script.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-94, CWE-95
Published	2025-05-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: znuny

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

Am I affected?

Timeline

2025-05-08 17:16 UTCPublished CVE record published
2026-06-17 09:02 UTCUpdated Record last modified

znuny znuny UPGRADE

Affected: >= 6.0.31 and <= 6.0.48 · >= 6.5.1 and <= 6.5.11 · >= 7.0.1 and <= 7.1.3

Fixed in: newer than 7.1.3

Safe to downgrade to: a release before 6.0.31

1. Check installed version

apt-cache policy znuny || rpm -q znuny || znuny --version

2. UPGRADE to newer than 7.1.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade znuny

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade znuny

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 6.0.31 (Debian / Ubuntu)

apt-cache madison znuny sudo apt install znuny=<VERSION_BEFORE_6.0.31> sudo apt-mark hold znuny

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

dnf --showduplicates list znuny sudo dnf downgrade znuny-<VERSION_BEFORE_6.0.31> sudo dnf versionlock add znuny

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-2025-26845?

znuny: upgrade to newer than 7.1.3. Exact commands for each OS are on this page.

Is CVE-2025-26845 being exploited?

CVE-2025-26845 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-2025-26845 affect?

CVE-2025-26845 affects znuny. Severity is critical (CVSS 9.8). An Eval Injection issue was discovered in Znuny through 7.1.3. A user with write access to the configuration file can use this to execute a command executed by the user running the backup.pl script.

How urgent is CVE-2025-26845?

Priority 50/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-43926 MEDIUM 6.1 UPGRADE An issue was discovered in Znuny through 6.5.14 and 7.x through 7.1.6
CVE-2025-26847 HIGH 7.5 UPGRADE An issue was discovered in Znuny before 7.1.5
CVE-2025-26846 CRITICAL 9.8 UPGRADE An issue was discovered in Znuny before 7.1.4
CVE-2025-26844 CRITICAL 9.8 UPGRADE An issue was discovered in Znuny through 7.1.3
CVE-2025-26842 HIGH 7.5 UPGRADE An issue was discovered in Znuny through 7.1.3

References

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