Critical severity · published Feb 9, 2024
CVE-2024-21762
Fortinet FortiOS Out-of-Bound Write Vulnerability
RansomwareIn wildKEV
9.8
CVSS
84.6%
EPSS
Yes
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)84.6% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Feb 9, 2024
Federal remediation dueFeb 16, 2024
Ransomware campaign useKnown
Affected products
Which versions
FO
FortiOS · Fortinet
7.4.0 through 7.4.2; 7.2.0 through 7.2.6; 7.0.0 through 7.0.13; 6.4.0 through 6.4.14; 6.2.0 through 6.2.15; 6.0.0 through 6.0.18 · source: vendor, NVD, CISA, KEV
FO
FortiProxy · Fortinet
7.4.0 through 7.4.2; 7.2.0 through 7.2.8; 7.0.0 through 7.0.14; 2.0.0 through 2.0.13; 1.2.1 through 1.2.13; 01.02.00; +3 more · source: vendor, NVD, CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-21762
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-21762
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
fortiguard.com
https://fortiguard.com/psirt/FG-IR-24-015
More from FortiOS
9.8
CVE-2026-24858
Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
9.8
CVE-2025-25249
Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
9.8
CVE-2025-59718
Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability
9.8
CVE-2024-55591
Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability
9.8
CVE-2024-23113
Fortinet Multiple Products Format String Vulnerability
