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CVE-2025-66399

Cacti command injection

8.8 HIGHPublic exploitEPSS 10.8%
  1. Published2 Dec 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Cacti< 1.2.29

Remediation

Fixed in
Cacti≥ 1.2.29

References

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Frequently asked

Is CVE-2025-66399 being actively exploited?

CVE-2025-66399 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 10.8%.

How severe is CVE-2025-66399?

CVE-2025-66399 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 10.8% probability of exploitation.

Which products are affected by CVE-2025-66399?

Affected products include Cacti.

How do I fix CVE-2025-66399?

Upgrade affected software to a fixed version, for example Cacti 1.2.29 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.