CVE-1999-0453
An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the...
An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the Cisco Discovery Protocol (CDP).
Exploit likelihood
What each source reports
NVD Score used
An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the Cisco Discovery Protocol (CDP).
- Record
CVE-1999-0453- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
CVE List No score
An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the Cisco Discovery Protocol (CDP).
- Record
CVE-1999-0453- Updated
- 2026-11-02
EUVDEUVD-1999-0453 No score
An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the Cisco Discovery Protocol (CDP).
- Record
EUVD-1999-0453- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-x3m2-cfrc-7vhc No score
An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the...
An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the Cisco Discovery Protocol (CDP).
- Record
GHSA-x3m2-cfrc-7vhc- Weakness
- CWE-200
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-1999-0453 is a medium vulnerability (CVSS 5.0) in Cisco Router, published January 1, 1999. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.42%, the 72nd percentile. No source names a fixed version.