{"cve_id":"CVE-2026-88771","published":"2026-09-27T17:16:56.260000+00:00","last_modified":"2026-09-29T04:18:01.603000+00:00","vuln_status":"Analyzed","description":"Improper input validation 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 an unauthenticated attacker to execute arbitrary commands.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","base_score":9.8,"base_severity":"CRITICAL","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-20"],"in_kev":true,"kev_date_added":"2026-09-27","kev_ransomware":false,"epss_score":0.8216,"epss_percentile":0.99655,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-10-07T07:16:13.476827+00:00","first_seen":"2026-09-28T03:15:12.886912+00:00","kev_first_seen":"2026-09-28T03:15:19.551402+00:00","novelty_score":58.92,"novelty_reasons":["EPSS_SPIKE","HIGH_LEVERAGE_STEPPING_STONE","REACHES_TERMINAL","RAISES_REACH_COMMON_PRODUCT"],"novelty_at":"2026-11-02T03:21:44.260683+00:00","vendors":["citrix"],"products":["netscaler_application_delivery_controller","netscaler_gateway"],"affected":[{"vendor":"citrix","product":"netscaler_application_delivery_controller","ranges":["≥ 13.1 and < 13.1-64.23","≥ 13.1 and < 13.1.37.279","≥ 14.1 and < 14.1-73.37","≥ 14.1-66.68 and ≤ 14.1-73.37"]},{"vendor":"citrix","product":"netscaler_gateway","ranges":["≥ 13.1 and < 13.1-64.23","≥ 14.1 and < 14.1-73.37"]}]}