CVE-2024-21762
Fortinet FortiOS Out-of-Bound Write Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 16 February 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 84.59% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 9 February 2024 · due 16 February 2024 · used in ransomware campaigns
- Weakness
- CWE-787
- Affected
- fortinet/fortiproxy · fortinet/fortios
- Source
- psirt@fortinet.com
EPSS moved from 84.6% on 25 October 2026 to 84.6% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://fortiguard.fortinet.com/psirt/FG-IR-24-015 ; https://nvd.nist.gov/vuln/detail/CVE-2024-21762
References
- https://fortiguard.com/psirt/FG-IR-24-015Vendor Advisory
- https://fortiguard.com/psirt/FG-IR-24-015Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21762US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.