{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20167","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","state":"PUBLISHED","assignerShortName":"cisco","dateReserved":"2025-10-08T11:59:15.390Z","datePublished":"2026-05-06T16:15:57.113Z","dateUpdated":"2026-05-06T17:26:01.173Z"},"containers":{"cna":{"title":"Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability","metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","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 IoT Field Network Director could allow an authenticated, remote attacker with low privileges to cause a DoS condition on a remotely managed router.\r\n\r\nThis vulnerability is due to improper error handling. An attacker could exploit this vulnerability by submitting crafted input to the web-based management interface. A successful exploit could allow the attacker to request unauthorized files from a remote router, causing the router to reload and resulting in a DoS condition."}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iot-fnd-dos-n8N26Q4u","name":"cisco-sa-iot-fnd-dos-n8N26Q4u"}],"exploits":[{"lang":"en","value":"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."}],"source":{"advisory":"cisco-sa-iot-fnd-dos-n8N26Q4u","discovery":"EXTERNAL","defects":["CSCwm81015"]},"problemTypes":[{"descriptions":[{"lang":"en","description":"Improper Access Control","type":"cwe","cweId":"CWE-284"}]}],"affected":[{"vendor":"Cisco","product":"Cisco IoT Field Network Director (IoT-FND)","versions":[{"version":"4.5.1","status":"affected"},{"version":"4.4.3","status":"affected"},{"version":"4.1.0","status":"affected"},{"version":"4.1.3","status":"affected"},{"version":"4.6.1","status":"affected"},{"version":"4.1.1","status":"affected"},{"version":"4.4.0","status":"affected"},{"version":"4.2.0","status":"affected"},{"version":"4.4.2","status":"affected"},{"version":"4.3.0","status":"affected"},{"version":"4.6.0","status":"affected"},{"version":"4.4.4","status":"affected"},{"version":"4.3.2","status":"affected"},{"version":"4.1.2","status":"affected"},{"version":"4.4.1","status":"affected"},{"version":"4.5.0","status":"affected"},{"version":"4.3.1","status":"affected"},{"version":"4.7.0","status":"affected"},{"version":"4.6.2","status":"affected"},{"version":"4.7.1","status":"affected"},{"version":"4.7.2","status":"affected"},{"version":"4.8.0","status":"affected"},{"version":"4.8.1","status":"affected"},{"version":"4.9.0","status":"affected"},{"version":"4.9.1","status":"affected"},{"version":"4.10.0","status":"affected"},{"version":"4.9.2","status":"affected"},{"version":"4.11.0","status":"affected"},{"version":"4.12.0","status":"affected"},{"version":"4.12.1","status":"affected"}],"defaultStatus":"unknown"}],"providerMetadata":{"orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco","dateUpdated":"2026-05-06T16:15:57.113Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-06T17:25:48.384518Z","id":"CVE-2026-20167","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-06T17:26:01.173Z"}}]}}