{"cveID":"CVE-2024-21762","vendorProject":"Fortinet","product":"FortiOS","vulnerabilityName":"Fortinet FortiOS Out-of-Bound Write Vulnerability","dateAdded":"2024-02-09","shortDescription":"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.","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","dueDate":"2024-02-16","knownRansomwareCampaignUse":"Known","notes":"https://fortiguard.fortinet.com/psirt/FG-IR-24-015 ;   https://nvd.nist.gov/vuln/detail/CVE-2024-21762","cwes":["CWE-787"],"year":2024,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2024-21762","technique":"T1190","technique_name_at_mapping":"Exploit Public-Facing Application","mapping_type":"exploitation_technique","capability_group":"oob","comments":"This vulnerability allows adversaries to execute arbitrary code via specially crafted http requests that trigger an out of bounds write. Threat actors have been observed implementing a symbolic link, left behind to maintain read-only access to impacted devices.","references":["https://www.tenable.com/blog/cve-2024-21762-critical-fortinet-fortios-out-of-bound-write-ssl-vpn-vulnerability","https://github.com/h4x0r-dz/CVE-2024-21762","https://www.fortinet.com/blog/psirt-blogs/analysis-of-threat-actor-activity"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"},{"domain":"enterprise","cve":"CVE-2024-21762","technique":"T1574","technique_name_at_mapping":"Hijack Execution Flow","mapping_type":"exploitation_technique","capability_group":"oob","comments":"This vulnerability allows adversaries to execute arbitrary code via specially crafted http requests that trigger an out of bounds write.","references":["https://www.tenable.com/blog/cve-2024-21762-critical-fortinet-fortios-out-of-bound-write-ssl-vpn-vulnerability","https://github.com/h4x0r-dz/CVE-2024-21762"],"status":"complete","source_file":"kev-02.13.2025_attack-15.1-enterprise.json","attack_version":"15.1","kev_snapshot":"02/13/2025"},{"domain":"enterprise","cve":"CVE-2024-21762","technique":"T1547.009","technique_name_at_mapping":"Shortcut Modification","mapping_type":"secondary_impact","capability_group":"oob","comments":"This vulnerability allows adversaries to execute arbitrary code via specially crafted http requests that trigger an out of bounds write. Threat actors have been observed implementing a symbolic link, left behind to maintain read-only access to impacted devices.","references":["https://www.tenable.com/blog/cve-2024-21762-critical-fortinet-fortios-out-of-bound-write-ssl-vpn-vulnerability","https://github.com/h4x0r-dz/CVE-2024-21762","https://www.fortinet.com/blog/psirt-blogs/analysis-of-threat-actor-activity"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"},{"domain":"enterprise","cve":"CVE-2024-21762","technique":"T1574","technique_name_at_mapping":"Hijack Execution Flow","mapping_type":"primary_impact","capability_group":"oob","comments":"This vulnerability allows adversaries to execute arbitrary code via specially crafted http requests that trigger an out of bounds write. Threat actors have been observed implementing a symbolic link, left behind to maintain read-only access to impacted devices.","references":["https://www.tenable.com/blog/cve-2024-21762-critical-fortinet-fortios-out-of-bound-write-ssl-vpn-vulnerability","https://github.com/h4x0r-dz/CVE-2024-21762","https://www.fortinet.com/blog/psirt-blogs/analysis-of-threat-actor-activity"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"id":"T1190","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Exploit Public-Facing Application","name_at_mapping":"Exploit Public-Facing Application","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":149,"has_detection_strategy":true},{"id":"T1547.009","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Shortcut Modification","name_at_mapping":"Shortcut Modification","renamed":false,"revoked_by":null,"mapping_types":["secondary_impact"],"sigma_rule_count":4,"has_detection_strategy":true},{"id":"T1574","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Hijack Execution Flow","name_at_mapping":"Hijack Execution Flow","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique","primary_impact"],"sigma_rule_count":8,"has_detection_strategy":true}],"mapping_types":["exploitation_technique","primary_impact","secondary_impact"],"has_exploitation_technique":true,"mapping_attack_versions":["15.1","16.1"],"mapping_domains":["enterprise"],"sigma_coverage":"full","sigma_rules_tagged_cve":[],"added_after_mapping_snapshot":false,"_source":"kevmap","_built":"2026-08-23 05:47 UTC","_attack_version":"19.2"}