HIGH

CVE-2025-66399

CVSS v3

8.8

HIGH

EPSS Score

10.8 %

exploit probability, as of 2026-09-25

CISA KEV

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published: 2025-12-02

Frequently asked questions

What is CVE-2025-66399?

Is CVE-2025-66399 actively exploited?

Active exploitation of CVE-2025-66399 has not been confirmed. Its EPSS score was 10.8% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-66399?

CVE-2025-66399 has a CVSS v3 base score of 8.8 (HIGH severity).

Is CVE-2025-66399 affecting your environment?

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