CVE-1999-0063: Cisco IOS 12.0 and other versions can be crashed by malicious UDP packets to the syslog port.
Summary
Cisco IOS 12.0 and other versions can be crashed by malicious UDP packets to the syslog port.
Severity
UNKNOWN
Source Attribution
Source: NVD · Updated: 2026-08-21T04:30:42.735Z · Confidence: high
Impact
Based on CVSS vector: n/a — assess confidentiality, integrity, and availability impact via the official vector documentation.
Affected Software
Fix
Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.