{"schemaVersion":3,"id":"CVE-2018-15388","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability in the WebVPN login process of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause increased CPU utilization on an affected device. The vulnerability is due to excessive processing load for existing WebVPN login operations. An attacker could exploit this vulnerability by sending multiple WebVPN login requests to the device. A successful exploit could allow the attacker to increase CPU load on the device, resulting in a denial of service (DoS) condition.","dates":{"published":"2019-05-03T14:30:13.092Z","modified":"2024-11-19T19:10:11.904Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.6,"severity":"high","version":"3.0","versionLabel":"v3.0","source":"CVE.org","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"CVE.org","score":8.6,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":8.6,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.8,"severity":"high","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01983,"percentile":0.80392,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.016000000000000042,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.01967},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.01983,"percentile":0.80392}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01967,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01983,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.01983,"percentile":0.80392}]},"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-400","name":"Uncontrolled Resource Consumption","description":"The product does not properly control the allocation and maintenance of a limited resource.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/400.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":"< 9.4.4.34","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.5, < 9.6.4.25","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.7, < 9.8.4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.9, < 9.9.2.50","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 9.4.4.34 | ≥ 9.5, < 9.6.4.25 | ≥ 9.7, < 9.8.4 | ≥ 9.9, < 9.9.2.50","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, < 9.4.4.34","noFixRecorded":false,"fixedIn":null},{"text":"≥ unspecified, < 9.6.4.25","noFixRecorded":false,"fixedIn":null},{"text":"≥ unspecified, < 9.8.4","noFixRecorded":false,"fixedIn":null},{"text":"≥ unspecified, < 9.9.2.50","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 9.4.4.34 | ≥ unspecified, < 9.6.4.25 | ≥ unspecified, < 9.8.4 | ≥ unspecified, < 9.9.2.50","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":"< 6.2.3.12","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 6.2.3.12","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-20190501-sd-cpu-dos","label":"tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-sd-cpu-dos","hostname":"tools.cisco.com","tags":["Vendor Advisory","X Refsource CISCO"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2019-05-03T14:30:13.092Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-11-19T19:10:11.904Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":35,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T15:35:05.751Z","stale":false,"partial":false}}