{"api_version":"1","generated_at":"2026-04-23T00:59:39+00:00","cve":"CVE-2023-6549","urls":{"html":"https://cve.report/CVE-2023-6549","api":"https://cve.report/api/cve/CVE-2023-6549.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-6549","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-6549"},"summary":{"title":"Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability","description":"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.","state":"PUBLISHED","assigner":"","published_at":"2024-01-17 21:15:00","updated_at":"2024-01-24 20:48:00"},"problem_types":["CWE-119"],"metrics":[],"references":[{"url":"https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549","name":"https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549","refsource":"","tags":["Vendor Advisory"],"title":"NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2023-6548 and CVE-2023-6549","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-6549","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6549","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"6549","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"citrix","cpe5":"netscaler_application_delivery_controller","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"-","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"6549","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"citrix","cpe5":"netscaler_application_delivery_controller","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"fips","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"6549","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"citrix","cpe5":"netscaler_application_delivery_controller","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"ndcpp","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"6549","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"citrix","cpe5":"netscaler_gateway","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":{"cve_year":"2023","cve_id":"6549","cve":"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","catalogVersion":"2026.04.22","updated_at":"2026-04-22 20:03:10"},"epss":{"cve_year":"2023","cve_id":"6549","cve":"CVE-2023-6549","epss":"0.765090000","percentile":"0.989460000","score_date":"2026-04-22","updated_at":"2026-04-23 00:03:16"},"legacy_qids":[{"cve":"CVE-2023-6549","qid":"150807","title":"NetScaler Application Delivery Controller (ADC) and NetScaler Gateway Multiple Vulnerabilities (CTX584986)"},{"cve":"CVE-2023-6549","qid":"379265","title":"Citrix Application Delivery Controller (ADC) and Citrix Gateway Multiple Vulnerabilities (CTX584986)"}]},"source_records":{"cve_program":null,"nvd":{"publishedDate":"2024-01-17 21:15:00","lastModifiedDate":"2024-01-24 20:48:00","problem_types":["CWE-119"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*","versionStartIncluding":"13.0","versionEndExcluding":"13.0-92.21","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*","versionStartIncluding":"13.1","versionEndExcluding":"13.1-51.15","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*","versionStartIncluding":"14.1","versionEndExcluding":"14.1-12.35","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*","versionStartIncluding":"12.1","versionEndExcluding":"12.1-55.302","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*","versionStartIncluding":"12.1","versionEndExcluding":"12.1-55.302","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*","versionStartIncluding":"13.1","versionEndExcluding":"13.1-37.176","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*","versionStartIncluding":"13.0","versionEndExcluding":"13.0-92.21","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*","versionStartIncluding":"13.1","versionEndExcluding":"13.1-51.15","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*","versionStartIncluding":"14.1","versionEndExcluding":"14.1-12.35","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}