Is CVE-2024-21762 being actively exploited?

Yes. CVE-2024-21762 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on February 9, 2024.

What is the CVSS score for CVE-2024-21762?

CVE-2024-21762 has a CVSS 3.1 base score of 9.8 (CRITICAL).

CVE-2024-21762

CRITICAL · CVSS 9.8CISA KEV: actively exploitedEPSS 83.4%EU EUVD: exploited

A out-of-bounds write in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, 6.4.0 through 6.4.14, 6.2.0 through 6.2.15, 6.0.0 through 6.0.17, FortiProxy versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.8, 7.0.0 through 7.0.14, 2.0.0 through 2.0.13, 1.2.0 through 1.2.13, 1.1.0 through 1.1.6, 1.0.0 through 1.0.7 allows attacker to execute unauthorized code or commands via specifically crafted requests

Key facts

CVSS score: 9.8 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
EPSS score: 83.4% (100th percentile)
In CISA KEV: Yes, added February 9, 2024
In EU EUVD: Yes (EUVD-2024-19376)
Published: February 9, 2024
NVD last modified: August 4, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Fortinet FortiOS Out-of-Bound Write Vulnerability

Added to the KEV catalog on February 9, 2024; federal remediation due February 16, 2024. Known to be used in ransomware campaigns.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2024-19376 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on August 4, 2026.

View on the EU Vulnerability Database

Affected products

fortinet / fortios
fortinet / fortiproxy

Certified products that may be affected

4 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
FortiProxy-400E/2000E/4000E - Fortinet, Inc. - FIPS 140 3628 - historical
Fortinet FortiProxy v1.0 - Fortinet, Inc. - Common Criteria 383-4-475 - archived

References

https://fortiguard.com/psirt/FG-IR-24-015(Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21762(US Government Resource)

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

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