CVE-2026-20167
Full vulnerability record from the local CVENow database.
Description
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. This 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.
Severity
HIGH
CVSS score
7.7
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-05-06 17:16:20.433000
Last modified
2026-10-26 19:10:00.163000
View original CVE JSON
{
"id": "CVE-2026-20167",
"sourceIdentifier": "[email protected]",
"published": "2026-05-06T17:16:20.433",
"lastModified": "2026-10-26T19:10:00.163",
"vulnStatus": "Analyzed",
"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."
},
{
"lang": "es",
"value": "Una vulnerabilidad en la interfaz de gestión basada en web de Cisco IoT Field Network Director podría permitir a un atacante remoto autenticado con privilegios bajos causar una condición de DoS en un router gestionado remotamente.\n\nEsta vulnerabilidad se debe a un manejo inadecuado de errores. Un atacante podría explotar esta vulnerabilidad al enviar una entrada manipulada a la interfaz de gestión basada en web. Un exploit exitoso podría permitir al atacante solicitar archivos no autorizados de un router remoto, provocando que el router se recargue y resultando en una condición de DoS."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Cisco",
"product": "Cisco IoT Field Network Director (IoT-FND)",
"defaultStatus": "unknown",
"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"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"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"
},
"exploitabilityScore": 3.1,
"impactScore": 4.0
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-05-06T17:25:48.384518Z",
"id": "CVE-2026-20167",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-284"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:cisco:iot_field_network_director:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.0.0-117",
"matchCriteriaId": "AFAEB500-F901-497A-8E7A-13F350338E83"
}
]
}
]
}
],
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iot-fnd-dos-n8N26Q4u",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
}
]
}