{"id":"CVE-1999-1216","title":"Cisco routers 9.17 and earlier allow remote attackers to bypass security restrictions via certain IP source routed packets that should normally be denied using the \"no ip source-route\" command.","summary":"Cisco routers 9.17 and earlier allow remote attackers to bypass security restrictions via certain IP source routed packets that should normally be denied using the \"no ip source-route\" command.","severity":"high","cvss":7.5,"cvssVector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","published":"1993-04-22","updated":"2026-06-16","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-1999-1216","references":[{"url":"http://ciac.llnl.gov/ciac/bulletins/d-15.shtml","label":"cve@mitre.org"},{"url":"http://www.cert.org/advisories/CA-1993-07.html","label":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/541","label":"cve@mitre.org"},{"url":"http://ciac.llnl.gov/ciac/bulletins/d-15.shtml","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.cert.org/advisories/CA-1993-07.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/541","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.02081,"epssPercentile":0.80691,"ingestedAt":"2026-06-19T03:39:00.716Z","slug":"CVE-1999-1216","body":"## Overview\n\nCisco routers 9.17 and earlier allow remote attackers to bypass security restrictions via certain IP source routed packets that should normally be denied using the \"no ip source-route\" command.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.3,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}