CVE-2022-39954

Name: CVE-2022-39954
Creator: NVD / NIST
Published: 2023-02-16T19:15:13.12+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2022-39954 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. An improper restriction of xml external entity reference in Fortinet FortiNAC version 9.4.0 through 9.4.1, FortiNAC version 9.2.0 through 9.2.7, FortiNAC version 9.1.0 through 9.1.8, FortiNAC version 8.8.0 through 8.8.11, FortiNAC version 8.7.0 through 8.7.6, FortiNAC version 8.6.0 through 8.6.5, FortiNAC version 8.5.0 through 8.5.4, FortiNAC version 8.3.7 allows attacker to read arbitrary files or trigger a denial of service via specifically crafted XML documents.. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

An improper restriction of xml external entity reference in Fortinet FortiNAC version 9.4.0 through 9.4.1, FortiNAC version 9.2.0 through 9.2.7, FortiNAC version 9.1.0 through 9.1.8, FortiNAC version 8.8.0 through 8.8.11, FortiNAC version 8.7.0 through 8.7.6, FortiNAC version 8.6.0 through 8.6.5, FortiNAC version 8.5.0 through 8.5.4, FortiNAC version 8.3.7 allows attacker to read arbitrary files or trigger a denial of service via specifically crafted XML documents.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

0.55%

41.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Fortinet	Fortinac	>= 8.3.7, <= 9.2.7
Fortinet	Fortinac	>= 9.4.0, < 9.4.2
Fortinet	Fortinac-F	< 7.2.0

References

https://fortiguard.com/psirt/FG-IR-22-304Vendor Advisory
https://fortiguard.com/psirt/FG-IR-22-304Vendor Advisory

Timeline

Published: Feb 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-39954?

How severe is CVE-2022-39954?

CVE-2022-39954 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2022-39954?

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-2022-39954?

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

Scan your code now

Source: NVD / NIST