CVE record · CVE-2024-21762

Out-of-bounds write in Fortinet FortiOS and others

CVSS 9.6 CriticalCriticalIn CISA KEV · ransomwareEPSS 0.85 · 99th percentile

Critical, because:

In CISA’s KEV catalogue since 9 Feb 2024: it is known to be exploited.
CVSS score 9.6: 9.0 or more.
CVSS score 9.6 (7.0 or more) and EPSS 0.85 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

Published by the CVE Program (CNA: fortinet) at 9 Feb 2024, 08:14 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Fortinet	FortiOS	affected 7.4.0 to 7.4.2, inclusive semver affected 7.2.0 to 7.2.6, inclusive semver affected 7.0.0 to 7.0.13, inclusive semver affected 6.4.0 to 6.4.14, inclusive semver affected 6.2.0 to 6.2.15, inclusive semver affected 6.0.0 to 6.0.18, inclusive semver Other versions: unaffected
Fortinet	FortiProxy	affected 7.4.0 to 7.4.2, inclusive semver affected 7.2.0 to 7.2.8, inclusive semver affected 7.0.0 to 7.0.14, inclusive semver affected 2.0.0 to 2.0.13, inclusive semver affected 1.2.1 to 1.2.13, inclusive semver affected 01.02.00 affected 1.1.4 to 1.1.6, inclusive semver affected 01.01.00 to 01.01.03, inclusive semver affected 01.00.00 to 01.00.07, inclusive semver Other versions: unaffected

Identifiers: CVE-2024-21762
CNA: fortinet
Weakness (CWE): CWE-787
Tags: Fortinet FortiOS
Fortinet FortiProxy
Memory corruption
Published: 9 Feb 2024
Updated: 22 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.6	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:W/RC:C	CNA (fortinet)

CISA KEV Listed since 9 Feb 2024: known to be exploited. CISA reports use in ransomware campaigns.
EPSS 0.85, the 99th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 9 Feb 2024. New records show when each source confirmed them.

Sources

References from the CNA

fortiguard.com/psirt/FG-IR-24-015

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.