CVE-1999-0453
Cisco Router - Unauthenticated Device Identification via CDP Port 1999 SYN Packet
Title source: llmDescription
An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the Cisco Discovery Protocol (CDP).
References (1)
Core 1
Core References
Third Party Advisory, VDB Entry x_refsource_misc
https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0453
Scores
EPSS
0.0141
EPSS Percentile
69.6%
Details
CWE
CWE-200
Status
published
Products (1)
cisco/router
Published
Jan 01, 1999
Tracked Since
Feb 18, 2026