CVE-2024-21762
Published: February 9, 2024
Official Description
Fortinet FortiOS contains an out-of-bound write vulnerability that allows a remote unauthenticated attacker to execute code or commands via specially crafted HTTP requests.
CISA KEV Advisory
Fortinet FortiOS Out-of-Bound Write Vulnerability
Fortinet FortiOS contains an out-of-bound write vulnerability that allows a remote unauthenticated attacker to execute code or commands via specially crafted HTTP requests.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Risk Analysis
Fortinet FortiOS is affected by an out-of-bound write vulnerability, allowing a remote unauthenticated attacker to execute code or commands via specially crafted HTTP requests. This is a high-severity flaw, and its high EPSS score of 0.92941 indicates a very high likelihood of exploitation, making it an urgent concern for Fortinet users.
This vulnerability is actively exploited in the wild and is included in CISA's KEV catalog, confirming its active use by threat actors. The remote and unauthenticated nature of the attack vector makes it particularly dangerous.
Fortinet FortiOS users should apply the latest security patches and firmware updates immediately. Restricting access to the administrative interface and implementing strong network segmentation can also help reduce risk.
Technical Analysis
CVE-2024-21762 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2024-21762 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2024-21762 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1