{"cveID":"CVE-2023-3519","vendorProject":"Citrix","product":"NetScaler ADC and NetScaler Gateway","vulnerabilityName":"Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability","dateAdded":"2023-07-19","shortDescription":"Citrix NetScaler ADC and NetScaler Gateway contains a code injection vulnerability that allows for unauthenticated remote code execution.","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","dueDate":"2023-08-09","knownRansomwareCampaignUse":"Known","notes":"https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467;  https://nvd.nist.gov/vuln/detail/CVE-2023-3519","cwes":["CWE-94"],"year":2023,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2023-3519","technique":"T1190","technique_name_at_mapping":"Exploit Public-Facing Application","mapping_type":"exploitation_technique","capability_group":"code_injection","comments":"This vulnerability allows for unauthenticated remote code execution. This can be exploited via an HTTP GET request that triggers a stack buffer overflow.  Adversaries have been observed to use this exploitation to drop a webshell on a target machine and subsequently discover, collect, and exfiltrate active directory data.","references":["https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a","https://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.html"],"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-2023-3519","technique":"T1574","technique_name_at_mapping":"Hijack Execution Flow","mapping_type":"exploitation_technique","capability_group":"code_injection","comments":"This vulnerability allows for unauthenticated remote code execution. This can be exploited via an HTTP GET request that triggers a stack buffer overflow.  Adversaries have been observed to use this exploitation to drop a webshell on a target machine and subsequently discover, collect, and exfiltrate active directory data.","references":["https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a","https://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.html"],"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-2023-3519","technique":"T1087.002","technique_name_at_mapping":"Domain Account","mapping_type":"secondary_impact","capability_group":"code_injection","comments":"This vulnerability allows for unauthenticated remote code execution. This can be exploited via an HTTP GET request that triggers a stack buffer overflow.  Adversaries have been observed to use this exploitation to drop a webshell on a target machine and subsequently discover, collect, and exfiltrate active directory data.","references":["https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a","https://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.html"],"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-2023-3519","technique":"T1105","technique_name_at_mapping":"Ingress Tool Transfer","mapping_type":"primary_impact","capability_group":"code_injection","comments":"This vulnerability allows for unauthenticated remote code execution. This can be exploited via an HTTP GET request that triggers a stack buffer overflow.  Adversaries have been observed to use this exploitation to drop a webshell on a target machine and subsequently discover, collect, and exfiltrate active directory data.","references":["https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a","https://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.html"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"id":"T1087.002","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Domain Account","name_at_mapping":"Domain Account","renamed":false,"revoked_by":null,"mapping_types":["secondary_impact"],"sigma_rule_count":21,"has_detection_strategy":true},{"id":"T1105","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Ingress Tool Transfer","name_at_mapping":"Ingress Tool Transfer","renamed":false,"revoked_by":null,"mapping_types":["primary_impact"],"sigma_rule_count":87,"has_detection_strategy":true},{"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":"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"],"sigma_rule_count":8,"has_detection_strategy":true}],"mapping_types":["exploitation_technique","primary_impact","secondary_impact"],"has_exploitation_technique":true,"mapping_attack_versions":["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"}