CVE-1999-0453 — MEDIUM severity vulnerability (An attacker can identify a CISCO device by sending a SYN pac)
An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the Cisco Discovery Protocol (CDP).
| CVE ID | CVE-1999-0453 |
|---|---|
| Severity | MEDIUM |
| CVSS score | 5.0 |
| CVSS vector | AV:N/AC:L/Au:N/C:P/I:N/A:N |
| CWE | CWE-200 |
| Status | Modified |
| Published | 1999-01-01 |
| Last modified | 2026-04-16 |
| Description | An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the Cisco Discovery Protocol (CDP). |
| Source | NIST National Vulnerability Database |
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