Is CVE-2023-36639 being actively exploited?

CVE-2023-36639 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2023-36639?

CVE-2023-36639 has a CVSS 3.1 base score of 7.2 (HIGH).

CVE-2023-36639

HIGH · CVSS 7.2EPSS 1.1%EU EUVD

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.

Key facts

CVSS score: 7.2 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-134
EPSS score: 1.1% (64th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2023-40583)
Published: December 13, 2023
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2023-40583 in the EU Vulnerability Database. Last updated in EUVD on August 2, 2024.

View on the EU Vulnerability Database

Affected products

fortinet / fortios
fortinet / fortios
fortinet / fortipam
fortinet / fortipam
fortinet / fortiproxy

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Fortinet, Inc. FortiOS 7.0.7 - Fortinet, Inc. - Common Criteria NSCIB-CC-0590233-CR - active
FortiGate/FortiOS Version 6.2.7 - Fortinet, Inc. - Common Criteria 559-LSS - archived

References

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

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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