{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-20197",
        "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "state": "PUBLISHED",
        "assignerShortName": "cisco",
        "dateReserved": "2025-10-08T11:59:15.396Z",
        "datePublished": "2026-10-21T16:12:40.477Z",
        "dateUpdated": "2026-10-22T19:11:21.691Z"
    },
    "containers": {
        "cna": {
            "title": "Multiple Cisco Products Snort 3 Teredo Protocol Denial of Service Vulnerability",
            "metrics": [
                {
                    "format": "cvssV3_1",
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
                        "baseScore": 5.8,
                        "baseSeverity": "MEDIUM",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "CHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "LOW"
                    }
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Multiple Cisco products are affected by a vulnerability in the Snort 3 Teredo Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.\r\n\r\nThis vulnerability is due to incomplete error checking when Snort 3 parses Teredo packets. An attacker could exploit this vulnerability by sending a crafted Teredo packet to a targeted device to be parsed by Snort. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition."
                }
            ],
            "references": [
                {
                    "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-misc-dos-6mB22qAK",
                    "name": "cisco-sa-snort3-misc-dos-6mB22qAK"
                }
            ],
            "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-snort3-misc-dos-6mB22qAK",
                "discovery": "EXTERNAL",
                "defects": [
                    "CSCwu51451"
                ]
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Improper Restriction of Operations within the Bounds of a Memory Buffer",
                            "type": "cwe",
                            "cweId": "CWE-119"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Cisco",
                    "product": "Cisco Open Source Snort3",
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                            "version": "3.12.2.0",
                            "status": "affected"
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                            "version": "3.1.2.0",
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                        {
                            "version": "3.1.3.0",
                            "status": "affected"
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                        {
                            "version": "3.1.4.0",
                            "status": "affected"
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                        {
                            "version": "3.1.5.0",
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                        {
                            "version": "3.1.6.0",
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                        {
                            "version": "3.1.7.0",
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                        {
                            "version": "3.1.8.0",
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                        {
                            "version": "3.1.9.0",
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                        {
                            "version": "3.1.10.0",
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                        {
                            "version": "3.1.12.0",
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                        {
                            "version": "3.1.13.0",
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                        {
                            "version": "3.1.14.0",
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                            "version": "3.1.16.0",
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                            "type": "ssvc",
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                                "id": "CVE-2026-20197",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
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                                "timestamp": "2026-10-21T17:20:53.349854Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-22T13:37:55.683Z"
                }
            }
        ]
    }
}