{"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":0.99962,"epss_percentile":0.99975,"epss_as_of":"2026-08-28","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 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Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"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":"citrix","vendor_name":"Citrix","product_slug":"netscaler-application-delivery-controller","product_name":"netscaler_application_delivery_controller","version_start":"12.1","version_start_inclusive":true,"version_end":"12.1-55.328","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*"},{"vendor_slug":"citrix","vendor_name":"Citrix","product_slug":"netscaler-application-delivery-controller","product_name":"netscaler_application_delivery_controller","version_start":"13.1","version_start_inclusive":true,"version_end":"13.1-58.32","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*"},{"vendor_slug":"citrix","vendor_name":"Citrix","product_slug":"netscaler-application-delivery-controller","product_name":"netscaler_application_delivery_controller","version_start":"13.1","version_start_inclusive":true,"version_end":"13.1-37.235","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*"},{"vendor_slug":"citrix","vendor_name":"Citrix","product_slug":"netscaler-gateway","product_name":"NetScaler Gateway","version_start":"13.1","version_start_inclusive":true,"version_end":"13.1-58.32","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*"},{"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":"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":"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"},{"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"}],"exploit_refs":[{"source":"exploit-db","kind":"exploit-db","url":"https://www.exploit-db.com/exploits/52401","title":"Citrix NetScaler ADC/Gateway 14.1 - Memory Disclosure","author":"Yesith Alvarez","disclosed_at":"2025-08-11"},{"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":[{"id":385,"source":"The Hacker News","url":"https://thehackernews.com/2026/07/ransomware-groups-turn-to-citrix-bleed.html","title":"Ransomware Groups Turn to Citrix Bleed 2, BYOVD, and Supply Chain Credentials","summary":"Threat actors associated with the Anubis ransomware operation have been observed exploiting the Citrix Bleed 2 (CVE-2025-5777) vulnerability to obtain initial access.\n\n\"Although tactics differ between affiliates, common patterns emerged in tradecraft through use of legitimate Remote Management and Monitoring (RMM) tooling, credential access, and hands-on-keyboard procedures used for lateral","thumbnail_url":"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5gkjf1FwB4__nC6-pLZYnDv2rJA29UAL9mxfCv4BNSl1FxNpat9jD-OiMRLewjXJXyiSGvqiLYcewN_b1lLFHh0FhzKkrHFzu82jziSuOodYX87FkwjuCcXaqwzWRsiFdsBcd9mzDnak1rJpDu46F8TV206IEcD1pE7njojB8TcQEZ4Wa70KnK2vyeVKI/s1600/ransomwares.jpg","author":"info@thehackernews.com (The Hacker News)","published_at":"2026-07-02T18:30:33Z","fetched_at":"2026-07-02T20:02:24.084248Z","trending_score":2.3037469066469515e-9,"cve_ids":["CVE-2025-5777"]}],"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":"exploit_known","at":"2025-08-11T00:00:00Z","label":"Public exploit available","source":"exploit-db"},{"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"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"first_article","at":"2026-07-02T18:30:33Z","label":"First news coverage","source":"The Hacker News"},{"type":"cvss_changed","at":"2026-08-04T17:43:06.708006Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-08-04T17:43:06.708006Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-08-04T17:43:06.708006Z","label":"CVSS score revised","source":"nvd"},{"type":"started_trending","at":"2026-08-04T23:42:08.374915Z","label":"Started trending","source":null},{"type":"reached_number_one","at":"2026-08-04T23:42:08.374915Z","label":"Reached #1 trending","source":null}]}