{"id":"CVE-2026-88777","title":"Memory overflow vulnerability vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway.\n\nThis issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: befo…","summary":"Memory overflow vulnerability vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway.\n\nThis issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: befo…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-119"],"vendor":"citrix","product":"netscaler_application_delivery_controller","affected":["netscaler_application_delivery_controller >= 13.1, < 13.1-64.23","netscaler_application_delivery_controller >= 13.1, < 13.1.37.279","netscaler_application_delivery_controller >= 14.1, < 14.1-73.37","netscaler_application_delivery_controller >= 14.1-66.68, <= 14.1-73.37","netscaler_gateway >= 13.1, < 13.1-64.23","netscaler_gateway >= 14.1, < 14.1-73.37"],"patched":["netscaler_application_delivery_controller 14.1-73.37","netscaler_gateway 14.1-73.37"],"published":"2026-09-27","updated":"2026-09-29","sourceUpdated":"2026-09-29T22:19:03.363","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88777","references":[{"url":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096&articleTitle=Citrix_NetScaler_ADC_and_Citrix_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_88771_CVE_2026_88772_CVE_2026_88773_CVE_2026_88774_CVE_2026_88775_CVE_2026_88776_CVE_2026_88777_and_CVE_2026_88778","label":"50a63c94-1ea7-4568-8c11-eb79e7c5a2b5"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00719,"epssPercentile":0.5368,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-29T15:07:18.195758Z"},"scores":{"nvd":9.8,"cna":8.8},"ingestedAt":"2026-09-27T16:55:23.212Z","exploits":{"github":1,"githubRepos":["https://github.com/CompleTetech-Security/netscaler-cve-2026-88777-check"],"checkedAt":"2026-10-27T19:20:12.455Z"},"exploitAvailable":true,"slug":"CVE-2026-88777","body":"## Overview\n\nMemory overflow vulnerability vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway.\n\nThis issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23  leading to unpredictable or erroneous behavior or Denial of Service\n\n## Affected\n\n- `netscaler_application_delivery_controller >= 13.1, < 13.1-64.23`\n- `netscaler_application_delivery_controller >= 13.1, < 13.1.37.279`\n- `netscaler_application_delivery_controller >= 14.1, < 14.1-73.37`\n- `netscaler_application_delivery_controller >= 14.1-66.68, <= 14.1-73.37`\n- `netscaler_gateway >= 13.1, < 13.1-64.23`\n- `netscaler_gateway >= 14.1, < 14.1-73.37`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `netscaler_application_delivery_controller 14.1-73.37`\n- `netscaler_gateway 14.1-73.37`","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":229110,"id":"CVE-2026-88777","ts":1792942516570,"field":"exploit_available","old":"false","new":"true"},{"seq":212084,"id":"CVE-2026-88777","ts":1790619524584,"field":"cvss","old":"8.8","new":"9.8"},{"seq":212083,"id":"CVE-2026-88777","ts":1790619524584,"field":"severity","old":"high","new":"critical"}]}