{"schema":"threatline.record/2","record":{"id":"CVE-2025-6543","aliases":[],"summary":"Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability","details":"Citrix NetScaler ADC and Gateway contain a buffer overflow vulnerability leading to unintended control flow and Denial of Service. NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.","categories":["Network & edge"],"product":"NetScaler ADC and Gateway","vendor":"Citrix","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-6543","source_modified_at":"2026-02-26T17:50:24.557Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"ADC","vendor":"NetScaler","versions":[{"lessThan":"47.46","status":"affected","version":"14.1","versionType":"patch"},{"lessThan":"59.19","status":"affected","version":"13.1","versionType":"patch"},{"lessThan":"37.236","status":"affected","version":"13.1 FIPS and NDcPP","versionType":"patch"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-6543","source_modified_at":"2026-02-26T17:50:24.557Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Gateway","vendor":"NetScaler","versions":[{"lessThan":"47.46","status":"affected","version":"14.1","versionType":"patch"},{"lessThan":"59.19","status":"affected","version":"13.1","versionType":"patch"},{"lessThan":"37.236","status":"affected","version":"13.1 FIPS and NDcPP","versionType":"patch"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-6543","source_modified_at":"2026-02-26T17:50:24.557Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"ADC","ecosystem":null},"version":"47.46","basis":"first unaffected version stated in the CVE record"},{"source":"CVE 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unavailable.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.10562,"percentile":0.95777,"score_date":"2026-10-23"},"published_at":"2025-06-25T12:49:57.896Z","modified_at":"2026-02-26T17:50:24.557Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2025-6543","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-02-26T17:50:24.557Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2025-6543","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788"},{"url":"https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/","source":"CISA KEV"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6543","source":"CISA KEV"},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-6543","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"no","technical_impact":"total","assessed_at":"2025-07-17T03:55:32.992762Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-02-26T17:50:24.557Z","content_hash":"52f7bb40306ec11cd6f7fe5c1b3a56e16321234896d050c2470bf3abd2df665b"}}