{"id":"CVE-2012-4099","url":"https://www.cyber-defence.io/tools/cve/CVE-2012-4099","generatedAt":"2026-10-27T19:44:27.052Z","title":"The BGP implementation in Cisco NX-OS does not properly filter AS paths, which allows remote attackers to cause a denial of service (BGP service reset and resync) via a malformed UPDATE message, aka Bug ID CSCtn13065.","description":"The BGP implementation in Cisco NX-OS does not properly filter AS paths, which allows remote attackers to cause a denial of service (BGP service reset and resync) via a malformed UPDATE message, aka Bug ID CSCtn13065.","published":"2013-10-14T03:34:55.000Z","lastModified":"2026-06-16T23:44:25.000Z","status":"Modified","sourceIdentifier":"psirt@cisco.com","cvss":{"version":"2.0","score":4.3,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P"},"cwe":["CWE-20"],"affected":["cisco/nx-os"],"epss":{"score":0.01606,"percentile":0.75706,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.61%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://osvdb.org/98130","source":"psirt@cisco.com"},{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4099","tags":["Vendor Advisory"],"source":"psirt@cisco.com"},{"url":"http://osvdb.org/98130","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4099","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2012-4099","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}