{"cveID":"CVE-2023-6549","vendorProject":"Citrix","product":"NetScaler ADC and NetScaler Gateway","vulnerabilityName":"Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability","dateAdded":"2024-01-17","shortDescription":"Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for a denial-of-service when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","dueDate":"2024-02-07","knownRansomwareCampaignUse":"Unknown","notes":"https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549;   https://nvd.nist.gov/vuln/detail/CVE-2023-6549","cwes":["CWE-119"],"year":2023,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2023-6549","technique":"T1574","technique_name_at_mapping":"Hijack Execution Flow","mapping_type":"exploitation_technique","capability_group":"buffer_overflow","comments":"This buffer overflow vulnerability can be exploited to cause a denial of service.","references":["https://arcticwolf.com/resources/blog/cve-2023-6548-cve-2023-6549-dos-and-rce-vulnerabilities-exploited-in-citrix-netscaler-adc-and-netscaler-gateway/"],"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-2023-6549","technique":"T1499","technique_name_at_mapping":"Endpoint Denial of Service","mapping_type":"primary_impact","capability_group":"buffer_overflow","comments":"This buffer overflow vulnerability can be exploited to cause a denial of service.","references":["https://arcticwolf.com/resources/blog/cve-2023-6548-cve-2023-6549-dos-and-rce-vulnerabilities-exploited-in-citrix-netscaler-adc-and-netscaler-gateway/"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"id":"T1499","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Endpoint Denial of Service","name_at_mapping":"Endpoint Denial of Service","renamed":false,"revoked_by":null,"mapping_types":["primary_impact"],"sigma_rule_count":3,"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"],"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"}