{"basis":"claimed","id":"CVE-2025-20333","name":"Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerability","vendorProject":"Cisco","product":"Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense","publishedAt":"2025-09-25","cvss":{"score":9.9,"severity":"CRITICAL","version":"3.1"},"exploited":{"kevAdded":"2025-09-25","dueDate":"2025-09-26","ransomware":false},"epss":{"score":0.71207,"percentile":0.99409,"date":"2026-11-02"},"coverage":{"cloudflare":{"status":"blocks","firstOn":"2025-09-28","daysToRule":3},"aws":{"status":"none","firstOn":null,"daysToRule":null},"azure":{"status":"none","firstOn":null,"daysToRule":null},"google":{"status":"none","firstOn":null,"daysToRule":null},"fastly":{"status":"no_history","firstOn":null,"daysToRule":null},"f5":{"status":"rule","firstOn":"2025-12-03","daysToRule":69},"akamai":{"status":"no_source","firstOn":null,"daysToRule":null},"crs":{"status":"none","firstOn":null,"daysToRule":null}},"title":null,"description":"A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to execute arbitrary code on an affected device.\r\n\r This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker with valid VPN user credentials could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of the affected device.","cwes":["CWE-120"],"vendors":[{"vendor":"cloudflare","status":"blocks","basis":"claimed","firstOn":"2025-09-28","firstIsNew":true,"daysToRule":3,"daysAtMost":null,"freePlan":false,"claims":[{"id":"67f1165e6dbf1b234f8dd479a1bc870f2e7a94c16f334a916367e32ed0be5451","cve_id":"CVE-2025-20333","vendor":"cloudflare","product":"Cloudflare Managed Ruleset","rule_id":"a1bef4ada0b146d2862cad439ee0ab84","rule_name":"Cisco Secure Firewall Adaptive Security Appliance - Remote Code Execution - CVE:CVE-2025-20333, CVE:CVE-2025-20362, CVE:CVE-2025-20363","change":"new","default_action":"Disabled","published_on":"2025-09-28","source_url":"https://developers.cloudflare.com/changelog/post/2025-09-28-emergency-waf-release/","source_title":"WAF Release - 2025-09-28 - Emergency","excerpt":"Cisco Secure Firewall Adaptive Security Appliance - Remote Code Execution - CVE:CVE-2025-20333, CVE:CVE-2025-20362, CVE:CVE-2025-20363. 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This is a New Detection","first_seen_at":"2026-11-02T21:00:15.788Z"}]},{"vendor":"aws","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"azure","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"google","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"fastly","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"f5","status":"rule","basis":"claimed","firstOn":"2025-12-03","firstIsNew":true,"daysToRule":69,"daysAtMost":null,"freePlan":false,"claims":[{"id":"bfd1fcf9a71536bd1dfd3fb8d8b2ba2e7bca38d2c1088634a88d47be20d175b1","cve_id":"CVE-2025-20333","vendor":"f5","product":"Attack signatures","rule_id":"200011107","rule_name":"Cisco ASA/FTD Buffer Overflow","change":"new","default_action":null,"published_on":"2025-12-03","source_url":"https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog","source_title":"F5 Distributed Cloud attack signatures changelog","excerpt":"Added: signature 200011107 \"Cisco ASA/FTD Buffer Overflow\" (Buffer Overflow, risk High), systems: Cisco. References: CVE-2025-20333.","first_seen_at":"2026-11-02T21:00:25.304Z"}]},{"vendor":"akamai","status":"no_source","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"crs","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]}],"updatedAt":"2026-11-03T04:17:38.628Z","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","ssvc":{"exploitation":"active","automatable":"no","technicalImpact":"total"},"measured":[],"social":{"total":0,"first_seen":null,"daily":[{"day":"2026-10-21","posts":0},{"day":"2026-10-22","posts":0},{"day":"2026-10-23","posts":0},{"day":"2026-10-24","posts":0},{"day":"2026-10-25","posts":0},{"day":"2026-10-26","posts":0},{"day":"2026-10-27","posts":0},{"day":"2026-10-28","posts":0},{"day":"2026-10-29","posts":0},{"day":"2026-10-30","posts":0},{"day":"2026-10-31","posts":0},{"day":"2026-11-01","posts":0},{"day":"2026-11-02","posts":0},{"day":"2026-11-03","posts":0}],"top_posts":[],"exploit_repositories":[]}}