{"cve":{"cve_id":"CVE-2026-3055","is_kev":true,"kev_date_added":"2026-03-30","kev_vendor_project":"Citrix","kev_product":"NetScaler","kev_vulnerability_name":"Citrix NetScaler Out-of-Bounds Read Vulnerability","kev_short_description":"Citrix NetScaler ADC (formerly Citrix ADC), NetScaler Gateway (formerly Citrix Gateway) and NetScaler ADC FIPS and NDcPP contain an out-of-bounds reads vulnerability when configured as a SAML IDP leading to memory overread.","kev_required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","kev_due_date":"2026-04-02","kev_known_ransomware":false,"kev_notes":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300&articleURL=NetScaler_ADC_and_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_3055_and_CVE_2026_4368 ; https://nvd.nist.gov/vuln/detail/CVE-2026-3055","kev_cwes":["CWE-125"],"epss_score":0.83996,"epss_percentile":0.99657,"epss_as_of":"2026-06-23","description":"Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread","published_at":"2026-03-23T20:21:27.107000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":9.3,"cvss_v4_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L","cvss_v4_severity":"CRITICAL","ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-125"],"nvd_references":["https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-28T23:29:40.853712Z"},"effective_severity":"CRITICAL","badges":["kev","poc","epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"N","value_label":"None"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"H","value_label":"High"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"H","value_label":"High"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"H","value_label":"High"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"L","value_label":"Low"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"L","value_label":"Low"},{"metric":"SA","name":"Availability (Subsequent System)","value":"L","value_label":"Low"}]},"affected":[{"vendor_slug":"netscaler","vendor_name":"NetScaler","product_slug":"adc","product_name":"ADC","version_start":"14.1","version_start_inclusive":true,"version_end":"66.59","version_end_inclusive":false,"cpe23_uri":"cve5:netscaler:adc:14.1:66.59"},{"vendor_slug":"netscaler","vendor_name":"NetScaler","product_slug":"adc","product_name":"ADC","version_start":"13.1","version_start_inclusive":true,"version_end":"62.23","version_end_inclusive":false,"cpe23_uri":"cve5:netscaler:adc:13.1:62.23"},{"vendor_slug":"netscaler","vendor_name":"NetScaler","product_slug":"adc","product_name":"ADC","version_start":"13.1 FIPS and NDcPP","version_start_inclusive":true,"version_end":"37.262","version_end_inclusive":false,"cpe23_uri":"cve5:netscaler:adc:13.1 FIPS and NDcPP:37.262"},{"vendor_slug":"netscaler","vendor_name":"NetScaler","product_slug":"gateway","product_name":"Gateway","version_start":"14.1","version_start_inclusive":true,"version_end":"66.59","version_end_inclusive":false,"cpe23_uri":"cve5:netscaler:gateway:14.1:66.59"},{"vendor_slug":"netscaler","vendor_name":"NetScaler","product_slug":"gateway","product_name":"Gateway","version_start":"13.1","version_start_inclusive":true,"version_end":"62.23","version_end_inclusive":false,"cpe23_uri":"cve5:netscaler:gateway:13.1:62.23"}],"exploit_refs":[{"source":"nuclei","kind":"nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-3055.yaml","title":"Citrix NetScaler SAML IDP - Memory Overread","author":"watchtowr,shaikhyaser,DhiyaneshDk","disclosed_at":null}],"news":[],"references":[{"url":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-03-23T20:21:27.107000Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2026-03-30T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"poc_available","at":"2026-06-24T00:29:48.638073Z","label":"Public PoC available","source":"nuclei"},{"type":"cvss_changed","at":"2026-06-28T17:53:43.918028Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:43.918028Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:43.918028Z","label":"CVSS score revised","source":"cvelistv5"}]}