{"id":"CVE-2023-4966","title":"Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA  virtual server.","summary":"Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA  virtual server.","severity":"critical","cvss":9.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","cwe":["CWE-119"],"vendor":"citrix","product":"netscaler_application_delivery_controller","affected":["netscaler_application_delivery_controller >= 12.1, < 12.1-55.300","netscaler_application_delivery_controller >= 13.0, < 13.0-92.19","netscaler_application_delivery_controller >= 13.1, < 13.1-37.164","netscaler_application_delivery_controller >= 13.1, < 13.1-49.15","netscaler_application_delivery_controller >= 14.1, < 14.1-8.50","netscaler_gateway >= 13.0, < 13.0-92.19","netscaler_gateway >= 13.1, < 13.1-49.15","netscaler_gateway >= 14.1, < 14.1-8.50"],"patched":["netscaler_application_delivery_controller 14.1-8.50","netscaler_gateway 14.1-8.50"],"published":"2023-10-10","updated":"2026-07-31","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-4966","references":[{"url":"http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html","label":"secure@citrix.com"},{"url":"https://support.citrix.com/article/CTX579459","label":"secure@citrix.com"},{"url":"http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.citrix.com/article/CTX579459","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4966","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild","exploit-available"],"epss":0.99999,"epssPercentile":0.99998,"kev":true,"kevDateAdded":"2023-10-18","kevDueDate":"2023-11-08","kevRansomware":true,"exploited":true,"ingestedAt":"2026-07-31T04:58:34.420Z","exploits":{"github":14,"githubRepos":["https://github.com/Chocapikk/CVE-2023-4966","https://github.com/dinosn/citrix_cve-2023-4966","https://github.com/mlynchcogent/CVE-2023-4966-POC"],"metasploit":["auxiliary/scanner/http/citrix_bleed_cve_2023_4966"],"nuclei":["CVE-2023-4966"],"checkedAt":"2026-09-08T15:36:49.846Z"},"exploitAvailable":true,"slug":"CVE-2023-4966","body":"## Overview\n\nSensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA  virtual server.\n\n## Affected\n\n- `netscaler_application_delivery_controller >= 12.1, < 12.1-55.300`\n- `netscaler_application_delivery_controller >= 13.0, < 13.0-92.19`\n- `netscaler_application_delivery_controller >= 13.1, < 13.1-37.164`\n- `netscaler_application_delivery_controller >= 13.1, < 13.1-49.15`\n- `netscaler_application_delivery_controller >= 14.1, < 14.1-8.50`\n- `netscaler_gateway >= 13.0, < 13.0-92.19`\n- `netscaler_gateway >= 13.1, < 13.1-49.15`\n- `netscaler_gateway >= 14.1, < 14.1-8.50`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `netscaler_application_delivery_controller 14.1-8.50`\n- `netscaler_gateway 14.1-8.50`","depth":"hadal","depthScore":100,"depthScoreParts":{"impact":51.7,"likelihood":20,"exploitation":25,"ransomware":5},"changes":[{"seq":4669,"id":"CVE-2023-4966","ts":1788887197963,"field":"exploit_available","old":"false","new":"true"},{"seq":3552,"id":"CVE-2023-4966","ts":1788886314123,"field":"exploit_available","old":"true","new":"false"},{"seq":2406,"id":"CVE-2023-4966","ts":1788882983342,"field":"exploit_available","old":"false","new":"true"},{"seq":1435,"id":"CVE-2023-4966","ts":1788882396299,"field":"exploit_available","old":"true","new":"false"},{"seq":549,"id":"CVE-2023-4966","ts":1788881832635,"field":"exploit_available","old":"false","new":"true"}]}