CVE-2023-36639

Name: CVE-2023-36639
Creator: NVD / NIST
Published: 2023-12-13T07:15:12.9+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.06%

Last modified Jun 17, 2026

CVE-2023-36639 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A use of externally-controlled format string in Fortinet FortiProxy versions 7.2.0 through 7.2.4, 7.0.0 through 7.0.10, FortiOS versions 7.4.0, 7.2.0 through 7.2.4, 7.0.0 through 7.0.11, 6.4.0 through 6.4.12, 6.2.0 through 6.2.15, 6.0.0 through 6.0.17, FortiPAM versions 1.0.0 through 1.0.3 allows attacker to execute unauthorized code or commands via specially crafted API requests.. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

A use of externally-controlled format string in Fortinet FortiProxy versions 7.2.0 through 7.2.4, 7.0.0 through 7.0.10, FortiOS versions 7.4.0, 7.2.0 through 7.2.4, 7.0.0 through 7.0.11, 6.4.0 through 6.4.12, 6.2.0 through 6.2.15, 6.0.0 through 6.0.17, FortiPAM versions 1.0.0 through 1.0.3 allows attacker to execute unauthorized code or commands via specially crafted API requests.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.06%

60.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-134

Affected Software

Vendor	Product	Versions
Fortinet	Fortiproxy	>= 7.0.0, <= 7.0.10
Fortinet	Fortiproxy	>= 7.2.0, <= 7.2.4
Fortinet	Fortios	>= 6.0.0, <= 6.0.17
Fortinet	Fortios	>= 6.2.0, <= 6.2.15
Fortinet	Fortios	>= 6.4.0, <= 6.4.12
Fortinet	Fortios	>= 7.0.0, <= 7.0.11
Fortinet	Fortios	>= 7.2.0, <= 7.2.4
Fortinet	Fortios	7.4.0
Fortinet	Fortipam	>= 1.0.0, <= 1.0.3
Fortinet	Fortipam	1.1.0

References

https://fortiguard.com/psirt/FG-IR-23-138Vendor Advisory
https://fortiguard.com/psirt/FG-IR-23-138Vendor Advisory

Timeline

Published: Dec 13, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-36639?

How severe is CVE-2023-36639?

CVE-2023-36639 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.

How do I fix CVE-2023-36639?

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-2023-36639?

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

Scan your code now

Source: NVD / NIST