{
    "id": "CVE-2017-12238",
    "published": "2017-09-29 01:34:48",
    "last_modified": "2026-06-17 01:02:56",
    "cvss_score": "6.5",
    "cvss_severity": "MEDIUM",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "cwe": "CWE-399",
    "description": "A vulnerability in the Virtual Private LAN Service (VPLS) code of Cisco IOS 15.0 through 15.4 for Cisco Catalyst 6800 Series Switches could allow an unauthenticated, adjacent attacker to cause a C6800-16P10G or C6800-16P10G-XL type line card to crash, resulting in a denial of service (DoS) condition. The vulnerability is due to a memory management issue in the affected software. An attacker could exploit this vulnerability by creating a large number of VPLS-generated MAC entries in the MAC address table of an affected device. A successful exploit could allow the attacker to cause a C6800-16P10G or C6800-16P10G-XL type line card to crash, resulting in a DoS condition. This vulnerability affects Cisco Catalyst 6800 Series Switches that are running a vulnerable release of Cisco IOS Software and have a Cisco C6800-16P10G or C6800-16P10G-XL line card in use with Supervisor Engine 6T. To be vulnerable, the device must also be configured with VPLS and the C6800-16P10G or C6800-16P10G-XL line card needs to be the core-facing MPLS interfaces. Cisco Bug IDs: CSCva61927.",
    "epss_score": "0.02017",
    "epss_percentile": "0.80121",
    "kev": 1,
    "kev_due": "2022-03-24",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:21:56",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-03-24."
    },
    "products": [
        {
            "vendor": "cisco",
            "product": "c6800-16p10g"
        },
        {
            "vendor": "cisco",
            "product": "c6800-16p10g-xl"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6000"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6000_ws-svc-nam-1"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6000_ws-svc-nam-2"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6000_ws-x6380-nam"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6500"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6500_ws-svc-nam-1"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6500_ws-svc-nam-2"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6500_ws-x6380-nam"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6500-e"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6503-e"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6504-e"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6506-e"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6509-e"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6509-neb-a"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6509-v-e"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6513"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_6513-e"
        },
        {
            "vendor": "cisco",
            "product": "ios"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2017-12238",
        "date_added": "2022-03-03",
        "due_date": "2022-03-24",
        "vendor": "Cisco",
        "product": "Catalyst 6800 Series Switches",
        "name": "Cisco Catalyst 6800 Series Switches VPLS Denial-of-Service Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "http://www.securityfocus.com/bid/101040",
        "http://www.securitytracker.com/id/1039453",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-vpls",
        "http://www.securityfocus.com/bid/101040",
        "http://www.securitytracker.com/id/1039453",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-vpls",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12238"
    ]
}