CVE-2025-66399: Cacti is an open source performance and fault management framework. Prior to 1.2.29, there is an input-validation flaw…
CVE-2025-66399 · Severity: high · CVSS 8.8 · Published 2025-12-02
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 interpret newline-separated tokens as command boundaries, this can lead to unintended command execution with the privileges of the Cacti process. This vulnerability is fixed in 1.2.29.
No. Junglewise Threat Intelligence has no report of CVE-2025-66399 being exploited in the wild.
How severe is CVE-2025-66399?
High severity, with a CVSS score of 8.8, published 2 December 2025.
Which products and versions are affected?
Cacti. The advisory does not name versions.
Is there a fix for CVE-2025-66399?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-66399?
Check whether you run Cacti. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.