Cacti Cacti — CVE-2026-40079 (Critical)

Date Jun 25, 2026

Type Vendor advisory

Signal Critical vendor advisory

Vendor / Product Cacti · Cacti

CVE CVE-2026-40079

Critical vendor advisory CVE-2026-40079

Summary

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Command Injection due to lack of sanitization in the escape_command() function. The escape_command() function at lib/rrd.php is a no-op: it returns $command unchanged. The command line built by rrdtool_function_graph() is passed through this function and then to shell_exec($full_commandline). The risk is in __rrd_execute() where text_format values from graph templates (which may contain host variable substitutions) reach shell_exec without adequate escaping. This issue has been addre

Why it matters

This CVE carries a CRITICAL severity rating (CVSS 9.8) in Cacti Cacti. Patch or mitigate promptly. EPSS percentile: 56%.

Operator check

Review CVE-2026-40079 in your asset inventory. Apply patches per vendor guidance and verify Cacti is not exposed. CVSS score: 9.8. EPSS probability: 0.9%; percentile: 56%.

Sources

NVD — CVE-2026-40079 Source reference Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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