{"schemaVersion":3,"id":"CVE-2020-3434","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process on an affected device. A successful exploit could allow the attacker to stop the AnyConnect process, causing a DoS condition on the device. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.","dates":{"published":"2020-08-17T18:01:02.482Z","modified":"2024-11-13T18:14:59.077Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.9,"severity":"medium","vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00455,"percentile":0.38173,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00455},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00455,"percentile":0.38173}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00455,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00455,"percentile":0.38173}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"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"}],"affected":[{"vendor":"cisco","product":"anyconnect_secure_mobility_client","name":"anyconnect secure mobility client","label":"anyconnect_secure_mobility_client","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 4.9.00086","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 4.9.00086","eol":null,"hubHref":"/vendor/cisco/anyconnect_secure_mobility_client"},{"vendor":"cisco","product":"cisco anyconnect secure mobility client","name":"Cisco AnyConnect Secure Mobility Client","label":"cisco anyconnect secure mobility client","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"n/a","noFixRecorded":false,"fixedIn":null}],"versionsText":"n/a","eol":null,"hubHref":"/vendor/cisco/cisco_anyconnect_secure_mobility_client"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dos-feXq4tAV","label":"tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dos-feXq4tAV","hostname":"tools.cisco.com","tags":["Vendor Advisory","X Refsource CISCO"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-08-17T18:01:02.482Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-11-13T18:14:59.077Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":22,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T05:50:03.061Z","stale":false,"partial":false}}