{"id":"CVE-2026-111333","kind":"vulnerability","aliases":["CVE-2026-111333"],"related":[],"title":"Citrix NetScaler: memory overflow in authentication requests causes denial of service","description":"Memory overflow in an authentication request can lead to unpredictable or erroneous behavior or Denial of Service in Citrix NetScaler ADC and Citrix NetScaler Gateway.","summary":"A memory overflow in how Citrix NetScaler ADC and NetScaler Gateway handle authentication requests can cause unpredictable behavior or a denial of service. The sources do not say whether code execution or data access is possible.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["citrix","infrastructure","netscaler","netscaler-gateway","network-appliance"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-13T08:17:15+00:00","first_seen_at":"2026-11-13T08:44:23+00:00","triaged_at":"2026-11-13T08:45:25+00:00","updated_at":"2026-11-13T08:45:25+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-13T08:45:25Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"Citrix NetScaler: memory overflow in authentication requests causes denial of service","impact":"low","summary":"A memory overflow in how Citrix NetScaler ADC and NetScaler Gateway handle authentication requests can cause unpredictable behavior or a denial of service. The sources do not say whether code execution or data access is possible.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["citrix","netscaler","netscaler-gateway","network-appliance"],"confidence":0.5,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Appliance crashes or behaves erratically, causing denial of service","analyst_note":"Check the Citrix security bulletin and NVD entry for affected and fixed NetScaler versions and whether the flaw is reachable unauthenticated over the internet.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"NetScaler ADC and NetScaler Gateway appliances that handle authentication requests are the systems in scope. The sources do not say which versions or configurations are exposed, so unknown.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000681,"input_tokens":4518,"output_tokens":458,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-111333':14A,17A '-2026':13A,16A 'access':60B 'adc':34B,83C 'applianc':26B 'authent':6A,39B,67C 'behavior':44B,75C 'caus':8A,42B 'citrix':1A,18B,32B,81C,85C 'code':56B 'cve':12A,15A 'data':59B 'denial':9A,47B,77C 'erron':74C 'execut':57B 'gateway':23B,37B,87C 'handl':38B 'infrastructur':19B 'lead':70C 'memori':3A,28B,63C 'netscal':2A,20B,22B,33B,36B,82C,86C 'netscaler-gateway':21B 'network':25B 'network-appli':24B 'overflow':4A,29B,64C 'possibl':62B 'request':7A,40B,68C 'say':54B 'servic':11A,49B,79C 'sourc':51B 'unpredict':43B,72C 'whether':55B","nicknames":[],"mitigations":[],"who_affected":"NetScaler ADC and NetScaler Gateway appliances that handle authentication requests are the systems in scope. The sources do not say which versions or configurations are exposed, so unknown.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["citrix","infrastructure","medium","netscaler","netscalergateway","networkappliance"],"campaign_type":null,"search_a":"'-111333':14A,17A '-2026':13A,16A 'authent':6A 'caus':8A 'citrix':1A 'cve':12A,15A 'denial':9A 'memori':3A 'netscal':2A 'overflow':4A 'request':7A 'servic':11A","search_b":"'access':60B 'adc':34B 'applianc':26B 'authent':39B 'behavior':44B 'caus':42B 'citrix':18B,32B 'code':56B 'data':59B 'denial':47B 'execut':57B 'gateway':23B,37B 'handl':38B 'infrastructur':19B 'memori':28B 'netscal':20B,22B,33B,36B 'netscaler-gateway':21B 'network':25B 'network-appli':24B 'overflow':29B 'possibl':62B 'request':40B 'say':54B 'servic':49B 'sourc':51B 'unpredict':43B 'whether':55B","search_c":"'adc':83C 'authent':67C 'behavior':75C 'citrix':81C,85C 'denial':77C 'erron':74C 'gateway':87C 'lead':70C 'memori':63C 'netscal':82C,86C 'overflow':64C 'request':68C 'servic':79C 'unpredict':72C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-13T08:17:15+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"50a63c94-1ea7-4568-8c11-eb79e7c5a2b5","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-111333","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111333","severity":null,"published_at":"2026-11-13T08:17:15+00:00","modified_at":"2026-11-13T08:17:15+00:00","first_seen_at":"2026-11-13T08:44:23+00:00","fetched_at":"2026-11-13T08:44:23+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}