| CVE-1999-0843 | | 0.00 | — | 0.01 | | Nov 4, 1999 | Denial of service in Cisco routers running NAT via a PORT command from an FTP client to a Telnet port. |
| CVE-1999-0222 | | 0.00 | — | 0.01 | | Mar 1, 1999 | Denial of service in Cisco IOS web server allows attackers to reboot the router using a long URL. |
| CVE-1999-0453 | | 0.00 | — | 0.01 | | Jan 1, 1999 | An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the Cisco Discovery Protocol (CDP). |
| CVE-1999-1216 | | 0.00 | — | 0.01 | | Apr 22, 1993 | 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. |
