{"cve":{"cve_id":"CVE-2025-5777","is_kev":true,"kev_date_added":"2025-07-10","kev_vendor_project":"Citrix","kev_product":"NetScaler ADC and Gateway","kev_vulnerability_name":"Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability","kev_short_description":"Citrix NetScaler ADC and Gateway contain an out-of-bounds read vulnerability due to insufficient input validation. This vulnerability can lead to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.","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":"2025-07-11","kev_known_ransomware":true,"kev_notes":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420 ; https://nvd.nist.gov/vuln/detail/CVE-2025-5777","kev_cwes":["CWE-125"],"epss_score":0.99896,"epss_percentile":0.99963,"epss_as_of":"2026-06-23","description":"Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server","published_at":"2025-06-17T12:29:34.506000Z","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","CWE-457"],"nvd_references":["https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420"],"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":"2026-06-28T23:27:44.169561Z"},"effective_severity":"CRITICAL","badges":["kev","ransomware","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":"43.56","version_end_inclusive":false,"cpe23_uri":"cve5:netscaler:adc:14.1:43.56"},{"vendor_slug":"netscaler","vendor_name":"NetScaler","product_slug":"adc","product_name":"ADC","version_start":"13.1","version_start_inclusive":true,"version_end":"58.32","version_end_inclusive":false,"cpe23_uri":"cve5:netscaler:adc:13.1:58.32"},{"vendor_slug":"netscaler","vendor_name":"NetScaler","product_slug":"gateway","product_name":"Gateway","version_start":"14.1","version_start_inclusive":true,"version_end":"43.56","version_end_inclusive":false,"cpe23_uri":"cve5:netscaler:gateway:14.1:43.56"},{"vendor_slug":"netscaler","vendor_name":"NetScaler","product_slug":"gateway","product_name":"Gateway","version_start":"13.1","version_start_inclusive":true,"version_end":"58.32","version_end_inclusive":false,"cpe23_uri":"cve5:netscaler:gateway:13.1:58.32"}],"exploit_refs":[{"source":"nuclei","kind":"nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-5777.yaml","title":"Citrix NetScaler Memory Disclosure - CitrixBleed 2","author":"watchtowr,DhiyaneshDk,darses","disclosed_at":null}],"news":[],"references":[{"url":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2025-06-17T12:29:34.506000Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2025-07-10T00:00:00Z","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":"2026-06-28T17:48:34.338798Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:48:34.338798Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:48:34.338798Z","label":"CVSS score revised","source":"cvelistv5"}]}