{"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"}}]}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-20167", "lastModified": "2026-05-06T17:16:20.433", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 4.0, "source": "psirt@cisco.com", "type": "Primary"}]}, "published": "2026-05-06T17:16:20.433", "references": [{"source": "psirt@cisco.com", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iot-fnd-dos-n8N26Q4u"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "psirt@cisco.com", "type": "Primary"}]}

{}

{"created": "2026-05-06T17:30:08.253524+00:00", "updated": "2026-05-06T17:30:08.253540+00:00", "vendors": []}