{"id":"CVE-2013-1121","aliases":["EUVD-2013-1161","GHSA-fhpq-rxph-9fx4"],"status":"published","title":"The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is...","description":"The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554.","severity":{"version":"2.0","score":5.4,"vector":"AV:N/AC:H/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.0106,"percentile":0.64781,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-399"],"published":"2013-09-19T18:00:00Z","modified":"2026-06-16T23:50:52Z","products":[{"vendor":"cisco","product":"nx-os"}],"references":[{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-1121","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-1121"},{"url":"https://github.com/advisories/GHSA-fhpq-rxph-9fx4"}],"sources":{"cve":[{"id":"CVE-2013-1121","description":"The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554.","status":"published","published":"2013-09-19T18:00:00Z","modified":"2024-09-16T22:25:05.143Z","updated_at":"2026-11-02T14:34:58.534075Z"}],"euvd":[{"id":"EUVD-2013-1161","description":"The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554.","status":"published","published":"2013-09-19T18:00:00Z","modified":"2024-09-16T22:25:05Z","updated_at":"2026-11-03T00:55:03.452021Z"}],"ghsa":[{"id":"GHSA-fhpq-rxph-9fx4","title":"The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is...","description":"The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554.","status":"published","published":"2022-05-17T05:04:25Z","modified":"2023-01-28T05:03:11Z","updated_at":"2026-11-02T14:43:55.582977Z"}],"nvd":[{"id":"CVE-2013-1121","description":"The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554.","status":"published","published":"2013-09-19T18:55:05.54Z","modified":"2026-06-16T23:50:52.753Z","cvss":[{"version":"2.0","score":5.4,"vector":"AV:N/AC:H/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-399"],"updated_at":"2026-11-02T14:02:38.715467Z"}]}}