Critical 9.6Known exploited (CISA KEV)Published Feb 9, 2024

CVE-2024-21762A out-of-bounds write vulnerability in Fortinet FortiOS 7.4.0 through 7.4.2, FortiOS 7.2.0 through 7.2.6, FortiOS 7.0.0 through 7.0.13, FortiOS 6.4.0 through 6.4.14, FortiOS 6.2.0 through 6.2.15, For…

Updated under an hour ago (Oct 27, 2026, 3:00 PM ET)

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It affects Fortinet FortiOS and 1 other product. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Feb 9, 2024; federal agencies had to remediate by Feb 16, 2024, and it is known to be used in ransomware. Treat that date as your deadline.

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Every CVE for Fortinet FortiOS

Exploited in the last 30 days

A out-of-bounds write vulnerability in Fortinet FortiOS 7.4.0 through 7.4.2, FortiOS 7.2.0 through 7.2.6, FortiOS 7.0.0 through 7.0.13, FortiOS 6.4.0 through 6.4.14, FortiOS 6.2.0 through 6.2.15, FortiOS 6.0 all versions, FortiProxy 7.4.0 through 7.4.2, FortiProxy 7.2.0 through 7.2.8, FortiProxy 7.0.0 through 7.0.14, FortiProxy 2.0.0 through 2.0.13, FortiProxy 01.02 all versions, FortiProxy 1.2 all versions, FortiProxy 01.01 all versions, FortiProxy 1.1 all versions, FortiProxy 01.00 all versions allows attacker to execute unauthorized code or commands via specifically crafted requests

CVSS: 9.6 CRITICAL (v3.1, CNA)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
Weakness (CWE): CWE-787
Known exploited: Added to CISA KEV Feb 9, 2024; federal remediation due Feb 16, 2024; known ransomware useApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 84.59% (percentile 100)
Assigned by: fortinet
NVD analysis: Analyzed
Record last updated: Oct 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Fortinet FortiOS fortinet:fortios	from 7.4.0 through 7.4.2; from 7.2.0 through 7.2.6; from 7.0.0 through 7.0.13; from 6.4.0 through 6.4.14; from 6.2.0 through 6.2.15; from 6.0.0 through 6.0.18	CNA record
Fortinet FortiProxy fortinet:fortiproxy	from 7.4.0 through 7.4.2; from 7.2.0 through 7.2.8; from 7.0.0 through 7.0.14; from 2.0.0 through 2.0.13; from 1.2.1 through 1.2.13; 01.02.00; from 1.1.4 through 1.1.6; from 01.01.00 through 01.01.03; and 1 more ranges	CNA record
fortinet fortiproxy fortinet:fortiproxy	from 1.0.0 before 2.0.14	CISA ADP
fortinet fortios fortinet:fortios	from 6.0.0 before 6.2.16	CISA ADP
fortinet fortiproxy fortinet:fortiproxy	from 1.0.0 before 2.0.14; from 7.0.0 before 7.0.15; from 7.2.0 before 7.2.9; from 7.4.0 before 7.4.3	NVD
fortinet fortios fortinet:fortios	from 6.0.0 before 6.0.18; from 6.2.0 before 6.2.16; from 6.4.0 before 6.4.15; from 7.0.0 before 7.0.14; from 7.2.0 before 7.2.7; from 7.4.0 before 7.4.3	NVD

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.