{"id":"CVE-2020-3452","published":"2020-07-22T20:15:11Z","modified":"2026-08-11T19:33:44Z","title":"Cisco ASA and FTD Read-Only Path Traversal Vulnerability","vendor":"Cisco","product":"Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)","tier":"core","eol":null,"description":{"text":"A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct directory traversal attacks and read sensitive files on a targeted system. The vulnerability is due to a lack of proper input validation of URLs in HTTP requests processed by an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request containing directory traversal character sequences to an affected device. A successful exploit could allow the attacker to view arbitrary files within the web services file system on the targeted device. The web services file system is enabled when the affected device is configured with either WebVPN or AnyConnect features. This vulnerability cannot be used to obtain access to ASA or FTD system files or underlying operating system (OS) files.","provenance":"source","from":"NVD"},"summary":{"text":"A path traversal flaw in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software stems from missing input validation of URLs in HTTP requests. An unauthenticated remote attacker can send a crafted HTTP request with directory traversal sequences to read arbitrary files within the web services file system, but only on devices configured with WebVPN or AnyConnect; system and OS files are not reachable.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-31T04:54:40Z"},"cvss":{"score":7.5,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.99992,"percentile":0.99986,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2020-3452","provenance":"source"},"vulncheckKev":{"dateAdded":"2021-11-03","exploitedFirstSeen":"2021-11-03","ransomware":false,"evidence":[{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2021-11-03"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-13&host_type=src&vulnerability=cve-2020-3452","date":"2023-11-13"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-14&host_type=src&vulnerability=cve-2020-3452","date":"2023-11-14"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-15&host_type=src&vulnerability=cve-2020-3452","date":"2023-11-15"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-16&host_type=src&vulnerability=cve-2020-3452","date":"2023-11-16"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-17&host_type=src&vulnerability=cve-2020-3452","date":"2023-11-17"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-18&host_type=src&vulnerability=cve-2020-3452","date":"2023-11-18"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-19&host_type=src&vulnerability=cve-2020-3452","date":"2023-11-19"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-20&host_type=src&vulnerability=cve-2020-3452","date":"2023-11-20"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-22&host_type=src&vulnerability=cve-2020-3452","date":"2023-11-22"}],"evidenceTotal":805,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev 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2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"},{"id":"CWE-20","name":"Improper Input Validation"}],"references":[{"url":"http://packetstormsecurity.com/files/158646/Cisco-ASA-FTD-Remote-File-Disclosure.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/158647/Cisco-Adaptive-Security-Appliance-Software-9.11-Local-File-Inclusion.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/159523/Cisco-ASA-FTD-9.6.4.42-Path-Traversal.html","tags":["Exploit","Third 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