CVE intelligenceCISA KEVRansomware use

CVE-2024-21762

Fortinet FortiOS Out-of-Bound Write Vulnerability

Published Feb 9, 2024Sources checked Oct 28, 2026

9.8CRITICALCVSS out of 10

What this means

Actively exploited

CISA lists CVE-2024-21762 in its Known Exploited Vulnerabilities catalog, which means exploitation has been observed. The entry applies to Fortinet FortiOS.

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA KEVListedObserved exploitation

EPSS84.6%Estimated 30-day exploitation probability

Ransomware useReported by CISACISA KEV ransomware field

Threat actors1Source-linked actor relationships

Overview

What is CVE-2024-21762?

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

Source: NVD

CISA says:Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.CISA catalog due date Feb 16, 2024