{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20311","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","state":"PUBLISHED","assignerShortName":"cisco","dateReserved":"2025-10-08T11:59:15.409Z","datePublished":"2026-08-05T16:32:36.347Z","dateUpdated":"2026-08-05T17:45:12.182Z"},"containers":{"cna":{"title":"Cisco IOS XE Software Web UI Denial of Service Vulnerability","metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H","baseScore":6.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"descriptions":[{"lang":"en","value":"A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to insufficient error handling in the web-based management interface. An attacker could exploit this vulnerability by authenticating with a malformed certificate. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition."}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xe-webui-dos-PtAODAWW","name":"cisco-sa-xe-webui-dos-PtAODAWW"}],"exploits":[{"lang":"en","value":"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."}],"source":{"advisory":"cisco-sa-xe-webui-dos-PtAODAWW","discovery":"INTERNAL","defects":["CSCwu25287"]},"problemTypes":[{"descriptions":[{"lang":"en","description":"Buffer Over-read","type":"cwe","cweId":"CWE-126"}]}],"affected":[{"vendor":"Cisco","product":"Cisco IOS XE Software","versions":[{"version":"17.3.1","status":"affected"},{"version":"17.3.1a","status":"affected"},{"version":"17.3.2a","status":"affected"},{"version":"17.3.1w","status":"affected"},{"version":"17.3.2","status":"affected"},{"version":"17.4.1","status":"affected"},{"version":"17.4.1a","status":"affected"},{"version":"17.3.1x","status":"affected"},{"version":"17.3.3","status":"affected"},{"version":"17.5.1","status":"affected"},{"version":"17.4.1b","status":"affected"},{"version":"17.3.1z","status":"affected"},{"version":"17.4.2","status":"affected"},{"version":"17.3.3a","status":"affected"},{"version":"17.3.5","status":"affected"},{"version":"17.3.4","status":"affected"},{"version":"17.5.1a","status":"affected"},{"version":"17.6.1","status":"affected"},{"version":"17.3.4a","status":"affected"},{"version":"17.6.1a","status":"affected"},{"version":"17.7.1","status":"affected"},{"version":"17.6.1x","status":"affected"},{"version":"17.6.2","status":"affected"},{"version":"17.3.4c","status":"affected"},{"version":"17.4.2a","status":"affected"},{"version":"17.3.4b","status":"affected"},{"version":"17.7.1a","status":"affected"},{"version":"17.8.1a","status":"affected"},{"version":"17.6.3a","status":"affected"},{"version":"17.6.3","status":"affected"},{"version":"17.7.2","status":"affected"},{"version":"17.7.1b","status":"affected"},{"version":"17.9.1w","status":"affected"},{"version":"17.3.5a","status":"affected"},{"version":"17.6.1z","status":"affected"},{"version":"17.8.1","status":"affected"},{"version":"17.9.1","status":"affected"},{"version":"17.6.4","status":"affected"},{"version":"17.3.5b","status":"affected"},{"version":"17.9.1a","status":"affected"},{"version":"17.3.6","status":"affected"},{"version":"17.10.1","status":"affected"},{"version":"17.6.1z1","status":"affected"},{"version":"17.10.1a","status":"affected"},{"version":"17.9.2","status":"affected"},{"version":"17.6.5","status":"affected"},{"version":"17.9.1x","status":"affected"},{"version":"17.9.1y","status":"affected"},{"version":"17.3.7","status":"affected"},{"version":"17.9.2a","status":"affected"},{"version":"17.9.3","status":"affected"},{"version":"17.11.1","status":"affected"},{"version":"17.10.1b","status":"affected"},{"version":"17.6.6","status":"affected"},{"version":"17.9.1x1","status":"affected"},{"version":"17.11.1a","status":"affected"},{"version":"17.9.3a","status":"affected"},{"version":"17.12.1","status":"affected"},{"version":"17.3.8","status":"affected"},{"version":"17.9.4","status":"affected"},{"version":"17.12.1w","status":"affected"},{"version":"17.9.1y1","status":"affected"},{"version":"17.12.1a","status":"affected"},{"version":"17.9.5","status":"affected"},{"version":"17.13.1","status":"affected"},{"version":"17.12.1x","status":"affected"},{"version":"17.12.2","status":"affected"},{"version":"17.14.1","status":"affected"},{"version":"17.9.4a","status":"affected"},{"version":"17.3.8a","status":"affected"},{"version":"17.6.6a","status":"affected"},{"version":"17.6.5a","status":"affected"},{"version":"17.6.7","status":"affected"},{"version":"17.15.1","status":"affected"},{"version":"17.13.1a","status":"affected"},{"version":"17.12.2a","status":"affected"},{"version":"17.12.3","status":"affected"},{"version":"17.12.1y","status":"affected"},{"version":"17.12.1z","status":"affected"},{"version":"17.9.5a","status":"affected"},{"version":"17.14.1a","status":"affected"},{"version":"17.9.5b","status":"affected"},{"version":"17.6.8","status":"affected"},{"version":"17.12.4","status":"affected"},{"version":"17.9.6","status":"affected"},{"version":"17.17.1","status":"affected"},{"version":"17.16.1","status":"affected"},{"version":"17.15.1w","status":"affected"},{"version":"17.12.3a","status":"affected"},{"version":"17.9.5c","status":"affected"},{"version":"17.15.1a","status":"affected"},{"version":"17.12.1z1","status":"affected"},{"version":"17.15.2","status":"affected"},{"version":"17.15.1b","status":"affected"},{"version":"17.9.5d","status":"affected"},{"version":"17.15.1x","status":"affected"},{"version":"17.9.6a","status":"affected"},{"version":"17.12.1z2","status":"affected"},{"version":"17.6.8a","status":"affected"},{"version":"17.16.1a","status":"affected"},{"version":"17.15.3","status":"affected"},{"version":"17.9.7","status":"affected"},{"version":"17.12.5","status":"affected"},{"version":"17.15.1y","status":"affected"},{"version":"17.9.5e","status":"affected"},{"version":"17.12.4a","status":"affected"},{"version":"17.15.2a","status":"affected"},{"version":"17.15.2c","status":"affected"},{"version":"17.15.2b","status":"affected"},{"version":"17.12.1z3","status":"affected"},{"version":"17.9.5f","status":"affected"},{"version":"17.12.4b","status":"affected"},{"version":"17.12.5a","status":"affected"},{"version":"17.18.1","status":"affected"},{"version":"17.12.6","status":"affected"},{"version":"17.12.1z4","status":"affected"},{"version":"17.9.8","status":"affected"},{"version":"17.9.7a","status":"affected"},{"version":"17.15.3a","status":"affected"},{"version":"17.15.4","status":"affected"},{"version":"17.12.5b","status":"affected"},{"version":"17.15.3b","status":"affected"},{"version":"17.18.1z","status":"affected"},{"version":"17.9.7b","status":"affected"},{"version":"17.12.5c","status":"affected"},{"version":"26.1.1","status":"affected"},{"version":"17.18.1a","status":"affected"},{"version":"17.15.4a","status":"affected"},{"version":"17.18.2","status":"affected"},{"version":"17.18.1w","status":"affected"},{"version":"17.15.4b","status":"affected"},{"version":"17.12.6a","status":"affected"},{"version":"17.12.7","status":"affected"},{"version":"17.15.4c","status":"affected"},{"version":"17.9.9","status":"affected"},{"version":"17.12.5d","status":"affected"},{"version":"17.15.4s1","status":"affected"},{"version":"17.15.5","status":"affected"},{"version":"17.12.1z5","status":"affected"},{"version":"17.18.1x","status":"affected"},{"version":"17.12.1z6","status":"affected"},{"version":"17.15.4d","status":"affected"},{"version":"17.12.6b","status":"affected"},{"version":"17.4.1c","status":"affected"},{"version":"17.15.5a","status":"affected"},{"version":"17.18.1y","status":"affected"},{"version":"17.12.7a","status":"affected"},{"version":"17.18.3","status":"affected"},{"version":"17.12.7b","status":"affected"},{"version":"17.18.3a","status":"affected"},{"version":"26.1.1a","status":"affected"},{"version":"26.2.1ea","status":"affected"}],"defaultStatus":"unknown"}],"providerMetadata":{"orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco","dateUpdated":"2026-08-05T16:32:36.347Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-20311","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-08-05T17:35:57.539429Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-05T17:45:12.182Z"}}]}}