{"schemaVersion":3,"id":"CVE-2020-3452","aliases":[],"status":"published","duplicateOf":null,"title":"Cisco ASA and FTD Read-Only Path Traversal Vulnerability","description":"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.","dates":{"published":"2020-07-22T20:00:22.049Z","modified":"2025-10-21T23:35:39.038Z","reserved":null,"kevAdded":["2021-11-03T00:00:00.000Z"],"kevDue":["2022-05-03T00:00:00.000Z"]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.99992,"percentile":0.99987,"severity":"critical","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.99992},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.99992,"percentile":0.99987}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.99992,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.99992,"percentile":0.99987}]},"kev":{"state":"listed","entries":[{"source":"cisa","sourceLabel":"CISA","dateAdded":"2021-11-03T00:00:00.000Z","dueDate":"2022-05-03T00:00:00.000Z","requiredAction":"Apply updates per vendor instructions.","name":"Cisco ASA and FTD Read-Only Path Traversal Vulnerability","description":"Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an improper input validation vulnerability when HTTP requests process URLs.  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.","notes":[{"type":"url","href":"https://nvd.nist.gov/vuln/detail/CVE-2020-3452","label":"nvd.nist.gov/vuln/detail/CVE-2020-3452"}],"vendor":"Cisco","product":"Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)","ransomware":false,"ransomwareUse":"Unknown","exploitationType":null}],"listedCount":1,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":true,"entry":{"source":"cisa","sourceLabel":"CISA","dateAdded":"2021-11-03T00:00:00.000Z","dueDate":"2022-05-03T00:00:00.000Z","requiredAction":"Apply updates per vendor instructions.","name":"Cisco ASA and FTD Read-Only Path Traversal Vulnerability","description":"Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an improper input validation vulnerability when HTTP requests process URLs.  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.","notes":[{"type":"url","href":"https://nvd.nist.gov/vuln/detail/CVE-2020-3452","label":"nvd.nist.gov/vuln/detail/CVE-2020-3452"}],"vendor":"Cisco","product":"Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)","ransomware":false,"ransomwareUse":"Unknown","exploitationType":null}},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_CD2CFEE96E5255CE","name":"Exploit Reference (packetstormsecurity.com)","source":"reference","url":"http://packetstormsecurity.com/files/158647/Cisco-Adaptive-Security-Appliance-Software-9.11-Local-File-Inclusion.html","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"REF_36D646FE430B1B96","name":"Exploit Reference (packetstormsecurity.com)","source":"reference","url":"http://packetstormsecurity.com/files/159523/Cisco-ASA-FTD-9.6.4.42-Path-Traversal.html","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"REF_6B7A2E0925E14C73","name":"Exploit Reference (packetstormsecurity.com)","source":"reference","url":"http://packetstormsecurity.com/files/160497/Cisco-ASA-9.14.1.10-FTD-6.6.0.1-Path-Traversal.html","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"48722","name":"Cisco Adaptive Security Appliance Software 9.11 - Local File Inclusion","source":"exploit-database","url":"https://www.exploit-db.com/exploits/48722","maturity":"poc","reliabilityScore":0.5,"verified":false,"type":null,"platforms":["hardware"],"requiresAuth":null,"exploitdb":{"verified":false,"type":"webapps","platform":"hardware","file":"exploits/hardware/webapps/48722.txt","codes":["CVE-2020-3452"]},"metasploit":null},{"id":"49262","name":"Cisco ASA 9.14.1.10 and FTD 6.6.0.1 - Path Traversal (2)","source":"exploit-database","url":"https://www.exploit-db.com/exploits/49262","maturity":"poc","reliabilityScore":0.5,"verified":false,"type":null,"platforms":["hardware"],"requiresAuth":null,"exploitdb":{"verified":false,"type":"webapps","platform":"hardware","file":"exploits/hardware/webapps/49262.py","codes":["CVE-2020-3452"]},"metasploit":null},{"id":"48871","name":"Cisco ASA and FTD 9.6.4.42 - Path Traversal","source":"exploit-database","url":"https://www.exploit-db.com/exploits/48871","maturity":"poc","reliabilityScore":0.5,"verified":false,"type":null,"platforms":["hardware"],"requiresAuth":null,"exploitdb":{"verified":false,"type":"webapps","platform":"hardware","file":"exploits/hardware/webapps/48871.txt","codes":["CVE-2020-3452"]},"metasploit":null}],"exploitCount":6,"weaknesses":[{"id":"CWE-20","name":"Improper Input Validation","description":"The product receives input or data, but it does\n        not validate or incorrectly validates that the input has the\n        properties that are required to process the data safely and\n        correctly.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/20.html"},{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","description":"The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/22.html"}],"affected":[{"vendor":"cisco","product":"adaptive_security_appliance_software","name":"adaptive security appliance software","label":"adaptive_security_appliance_software","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 9.6, < 9.6.4.42","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.8, < 9.8.4.20","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.9, < 9.9.2.74","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.10, < 9.10.1.42","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.12, < 9.12.3.12","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.13, < 9.13.1.10","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.14, < 9.14.1.10","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 9.6, < 9.6.4.42 | ≥ 9.8, < 9.8.4.20 | ≥ 9.9, < 9.9.2.74 | ≥ 9.10, < 9.10.1.42 | ≥ 9.12, < 9.12.3.12 | ≥ 9.13, < 9.13.1.10 | ≥ 9.14, < 9.14.1.10","eol":null,"hubHref":"/vendor/cisco/adaptive_security_appliance_software"},{"vendor":"cisco","product":"cisco adaptive security appliance (asa) software","name":"Cisco Adaptive Security Appliance (ASA) Software","label":"cisco adaptive security appliance (asa) software","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 9.6.4.42","noFixRecorded":false,"fixedIn":null},{"text":"≥ unspecified, < 9.8.4.20","noFixRecorded":false,"fixedIn":null},{"text":"≥ unspecified, < 9.9.2.74","noFixRecorded":false,"fixedIn":null},{"text":"≥ unspecified, < 9.10.1.42","noFixRecorded":false,"fixedIn":null},{"text":"≥ unspecified, < 9.13.1.10","noFixRecorded":false,"fixedIn":null},{"text":"≥ unspecified, < 9.14.1.10","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 9.6.4.42 | ≥ unspecified, < 9.8.4.20 | ≥ unspecified, < 9.9.2.74 | ≥ unspecified, < 9.10.1.42 | ≥ unspecified, < 9.13.1.10 | ≥ unspecified, < 9.14.1.10","eol":null,"hubHref":"/vendor/cisco/cisco_adaptive_security_appliance_asa_software"},{"vendor":"cisco","product":"secure_firewall_threat_defense","name":"secure firewall threat defense","label":"secure_firewall_threat_defense","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 6.2.3, < 6.2.3.16","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.3.0, < 6.3.0.6","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.4.0, < 6.4.0.10","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.5.0, < 6.5.0.5","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.6.0, < 6.6.0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 6.2.3, < 6.2.3.16 | ≥ 6.3.0, < 6.3.0.6 | ≥ 6.4.0, < 6.4.0.10 | ≥ 6.5.0, < 6.5.0.5 | ≥ 6.6.0, < 6.6.0.1","eol":null,"hubHref":"/vendor/cisco/secure_firewall_threat_defense"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ro-path-KJuQhB86","label":"tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ro-path-KJuQhB86","hostname":"tools.cisco.com","tags":["Vendor Advisory","X Refsource CISCO"]},{"url":"http://packetstormsecurity.com/files/158646/Cisco-ASA-FTD-Remote-File-Disclosure.html","label":"packetstormsecurity.com/files/158646/Cisco-ASA-FTD-Remote-File-Disclosure.html","hostname":"packetstormsecurity.com","tags":["X Refsource MISC","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/158647/Cisco-Adaptive-Security-Appliance-Software-9.11-Local-File-Inclusion.html","label":"packetstormsecurity.com/files/…","hostname":"packetstormsecurity.com","tags":["X Refsource MISC","Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/159523/Cisco-ASA-FTD-9.6.4.42-Path-Traversal.html","label":"packetstormsecurity.com/files/159523/Cisco-ASA-FTD-9.6.4.42-Path-Traversal.html","hostname":"packetstormsecurity.com","tags":["X Refsource MISC","Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/160497/Cisco-ASA-9.14.1.10-FTD-6.6.0.1-Path-Traversal.html","label":"packetstormsecurity.com/files/160497/Cisco-ASA-9.14.1.10-FTD-6.6.0.1-Path-Traversal.html","hostname":"packetstormsecurity.com","tags":["X Refsource MISC","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3452","label":"www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3452","hostname":"www.cisa.gov","tags":["Government Resource","US Government Resource"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-07-22T20:00:22.049Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"kev-added","date":"2021-11-03T00:00:00.000Z","label":"Added to CISA KEV","detail":"Cisco ASA and FTD Read-Only Path Traversal Vulnerability","source":"cisa"},{"kind":"kev-due","date":"2022-05-03T00:00:00.000Z","label":"CISA remediation due","detail":"Apply updates per vendor instructions.","source":"cisa"},{"kind":"modified","date":"2025-10-21T23:35:39.038Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":85,"level":"critical","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T13:55:24.979Z","stale":false,"partial":false}}