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Vulnerability record · CVE-1999-0063 · published 11 January 1999

CVE-1999-0063: Cisco ios vulnerability

Cisco · Ios

Cisco IOS 12.0 and other versions can be crashed by malicious UDP packets to the syslog port.

5.0 CVSS 2.0 Medium EPSS 8.2% · top 5.3%
5.0CVSS 2.0 base score
8.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
16 Jun 2026Last modified by NVD

Description

Cisco IOS 12.0 and other versions can be crashed by malicious UDP packets to the syslog port.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0063
https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0063

Track CVE-1999-0063 inside VULONE

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-1999-0063), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.