CVE-2026-39938

Name: CVE-2026-39938
Creator: NVD / NIST
Published: 2026-06-24T23:16:40.677+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.44%

Last modified Jun 26, 2026

CVE-2026-39938 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have unauthenticated LFI through graph_theme and rrdtool IPC serialization hardening. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have unauthenticated LFI through graph_theme and rrdtool IPC serialization hardening. This issue has been resolved in version 1.2.31.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.44%

34.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cacti	Cacti	< 1.2.31

References

https://github.com/Cacti/cacti/commit/9871f0cef9af285398d558c9b3188d5977e01a04Patch
https://github.com/Cacti/cacti/security/advisories/GHSA-rm7p-qcqm-x5m6Patch, Vendor Advisory

Timeline

Published: Jun 24, 2026
Last Modified: Jun 26, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-39938?

How severe is CVE-2026-39938?

CVE-2026-39938 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2026-39938?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-39938?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST