{"schemaVersion":3,"id":"CVE-2020-3397","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability in the Border Gateway Protocol (BGP) Multicast VPN (MVPN) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an affected device to unexpectedly reload, resulting in a denial of service (DoS) condition. The vulnerability is due to incomplete input validation of a specific type of BGP MVPN update message. An attacker could exploit this vulnerability by sending this specific, valid BGP MVPN update message to a targeted device. A successful exploit could allow the attacker to cause one of the BGP-related routing applications to restart multiple times, leading to a system-level restart. Note: The Cisco implementation of BGP accepts incoming BGP traffic from only explicitly configured peers. To exploit this vulnerability, an attacker must send a specific BGP MVPN update message over an established TCP connection that appears to come from a trusted BGP peer. To do so, the attacker must obtain information about the BGP peers in the trusted network of the affected system.","dates":{"published":"2020-08-27T15:40:34.148Z","modified":"2024-11-13T18:09:56.819Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.6,"severity":"high","version":"3.0","versionLabel":"v3.0","source":"CVE.org","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"CVE.org","score":8.6,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8.6,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":8.6,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.1,"severity":"high","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01812,"percentile":0.78295,"severity":"low","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.01812},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01812,"percentile":0.78295}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01812,"percentile":null},{"date":"2026-10-05T00:00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