CVE-2025-66399: Cacti is an open source performance and fault management framework

Q: How do I fix CVE-2025-66399?

cacti: upgrade to 1.2.29. Exact commands for each OS are on this page.

Q: Is CVE-2025-66399 being exploited?

CVE-2025-66399 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-2025-66399 affect?

CVE-2025-66399 affects cacti. Severity is high (CVSS 8.8). Cacti is an open source performance and fault management framework. Prior to 1.2.29, there is an input-validation flaw in the SNMP device configuration functionality. An authenticated Cacti user can supply crafted SNMP community strings con

Q: How urgent is CVE-2025-66399?

Priority 63/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact

This week

HIGH 8.8UPGRADE

CVE-2025-66399 is a high-severity flaw (CVSS 8.8) affecting cacti. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cacti is an open source performance and fault management framework. Prior to 1.2.29, there is an input-validation flaw in the SNMP device configuration functionality. An authenticated Cacti user can supply crafted SNMP community strings containing control characters (including newlines) that are accepted, stored verbatim in the database, and later embedded into backend SNMP operations. In environments where downstream SNMP tooling or wrappers int

Why this priority

High severity
EPSS top 4%: 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	10.8% (top 4%)
CISA exploited list	No
Weakness	CWE-77
Published	2025-12-02
Last modified	2026-10-18

Publisher (CNA): GitHub, Inc. · Vendor: cacti

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-02 18:15 UTCPublished CVE record published
2026-10-18 18:10 UTCUpdated Record last modified

cacti cacti UPGRADE

Affected: < 1.2.29

Fixed in: 1.2.29

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.2.29 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cacti

Note

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

Exact fixes by distribution

Fedora ELN · ibus-typing-booster · FIXED · 2.31.3-1.eln159 · FEDORA-2026-c895c68d60 · source

sudo dnf upgrade --advisory=FEDORA-2026-c895c68d60

Fedora 46 · perl-WWW-OrangeHRM-Client · FIXED · 0.12.0-21.fc46 · FEDORA-2026-2d14efca09 · source

sudo dnf upgrade --advisory=FEDORA-2026-2d14efca09

Ubuntu 25.10 · cacti · NOT AFFECTED

Debian 12 · cacti · NO FIX YET

Debian 13 · cacti · FIXED · 1.2.30+ds1-1

sudo apt update && sudo apt install --only-upgrade cacti dpkg --compare-versions "$(dpkg-query -W -f='${Version}' cacti)" ge "1.2.30+ds1-1" && echo PATCHED || echo STILL-VULNERABLE

Public exploits and detection

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

Write-up: github.com/Cacti/cacti/security/advisories/GHSA-c7rr-2h93-7gjf

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-2025-66399?

cacti: upgrade to 1.2.29. Exact commands for each OS are on this page.

Is CVE-2025-66399 being exploited?

CVE-2025-66399 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-2025-66399 affect?

CVE-2025-66399 affects cacti. Severity is high (CVSS 8.8). Cacti is an open source performance and fault management framework. Prior to 1.2.29, there is an input-validation flaw in the SNMP device configuration functionality. An authenticated Cacti user can supply crafted SNMP community strings con

How urgent is CVE-2025-66399?

Priority 63/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact

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References

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