Cacti vulnerabilities: known CVEs & security history
Cacti · Actively exploited · 15 tracked CVEs · 0 actively exploited · updated August 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Cacti release lines — 15 in total. A CVE here doesn't mean your version is affected — check Cacti's current status and the safe version to run.
Known Cacti CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-40079 | critical | 9.8 | 1% | 2026 |
| CVE-2026-39955 | critical | 9.8 | 0% | 2026 |
| CVE-2026-39948 | critical | 9.8 | 0% | 2026 |
| CVE-2026-39938 | critical | 9.8 | 0% | 2026 |
| CVE-2026-39893 | critical | 9.8 | 0% | 2026 |
| CVE-2026-39951 | high | 7.6 | 0% | 2026 |
| CVE-2026-40083 | high | 7.2 | 0% | 2026 |
| CVE-2026-40941 | medium | 6.5 | 0% | 2026 |
| CVE-2026-40084 | medium | 6.5 | 0% | 2026 |
| CVE-2026-40080 | medium | 6.1 | 0% | 2026 |
| CVE-2026-39900 | medium | 6.1 | 0% | 2026 |
| CVE-2026-39897 | medium | 6.1 | 0% | 2026 |
| CVE-2026-40082 | medium | 5.4 | 0% | 2026 |
| CVE-2026-39899 | medium | 5.3 | 0% | 2026 |
| CVE-2026-39894 | low | 2.9 | 0% | 2026 |
Is my Cacti version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Cacti version → · Monitor Cacti for new CVEs →
Cacti vulnerabilities — frequently asked
How many known vulnerabilities does Cacti have?
IsItPatched tracks 15 CVEs for Cacti. 5 are critical-severity and 2 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Cacti have any actively-exploited vulnerabilities?
None of Cacti's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Cacti vulnerability?
Among tracked issues, CVE-2026-40079 (CRITICAL, CVSS 9.8) ranks highest — a OS command injection weakness.
Is Cacti safe to use?
It depends on the version. The latest supported Cacti release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Cacti security status · Cacti end-of-life · actively-exploited CVEs. Always verify against Cacti's advisories — see our disclaimer.