{
    "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"
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                        {
                            "version": "17.6.2",
                            "status": "affected"
                        },
                        {
                            "version": "17.3.4c",
                            "status": "affected"
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                        {
                            "version": "17.4.2a",
                            "status": "affected"
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                            "version": "17.6.3a",
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                        },
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                        {
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                            "status": "affected"
                        },
                        {
                            "version": "17.12.1x",
                            "status": "affected"
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                        {
                            "version": "17.12.2",
                            "status": "affected"
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                            "version": "17.14.1",
                            "status": "affected"
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                            "status": "affected"
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                            "version": "17.3.8a",
                            "status": "affected"
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                            "version": "17.6.6a",
                            "status": "affected"
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                            "version": "17.6.5a",
                            "status": "affected"
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                            "version": "17.6.7",
                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "version": "17.6.8",
                            "status": "affected"
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                            "version": "17.12.4",
                            "status": "affected"
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                        {
                            "version": "17.9.6",
                            "status": "affected"
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                        {
                            "version": "17.17.1",
                            "status": "affected"
                        },
                        {
                            "version": "17.16.1",
                            "status": "affected"
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                            "version": "17.15.1w",
                            "status": "affected"
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                            "status": "affected"
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                            "version": "17.9.5c",
                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                        {
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                            "status": "affected"
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                        {
                            "version": "17.9.5d",
                            "status": "affected"
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                        {
                            "version": "17.15.1x",
                            "status": "affected"
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                        {
                            "version": "17.9.6a",
                            "status": "affected"
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                        {
                            "version": "17.12.1z2",
                            "status": "affected"
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                "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"
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                                "version": "2.0.3",
                                "timestamp": "2026-08-05T17:35:57.539429Z"
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}