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TI-1999-00062 Aliases CVE-1999-0063GHSA-h9f6-v64j-cw96

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

Priority LOW 34Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

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

Why it matters now

EPSS 0.08247 94th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios:11.3aa:*:*:*:*:*:*:*11.3aaVulnerableCisco
cpe:2.3:o:cisco:ios:11.3db:*:*:*:*:*:*:*11.3dbVulnerableCisco
cpe:2.3:o:cisco:ios:12.0:*:*:*:*:*:*:*12.0VulnerableCisco
cpe:2.3:o:cisco:ios:12.0\(1\)w:*:*:*:*:*:*:*12.0(1)wVulnerableCisco
cpe:2.3:o:cisco:ios:12.0\(1\)xa3:*:*:*:*:*:*:*12.0(1)xa3VulnerableCisco
cpe:2.3:o:cisco:ios:12.0\(1\)xb:*:*:*:*:*:*:*12.0(1)xbVulnerableCisco
cpe:2.3:o:cisco:ios:12.0\(1\)xe:*:*:*:*:*:*:*12.0(1)xeVulnerableCisco
cpe:2.3:o:cisco:ios:12.0\(2\)xc:*:*:*:*:*:*:*12.0(2)xcVulnerableCisco
cpe:2.3:o:cisco:ios:12.0\(2\)xd:*:*:*:*:*:*:*12.0(2)xdVulnerableCisco
cpe:2.3:o:cisco:ios:12.0db:*:*:*:*:*:*:*12.0dbVulnerableCisco
  • cpe:2.3:o:cisco:ios:11.3aa:*:*:*:*:*:*:* Versions 11.3aa Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.3db:*:*:*:*:*:*:* Versions 11.3db Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0\(1\)w:*:*:*:*:*:*:* Versions 12.0(1)w Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0\(1\)xa3:*:*:*:*:*:*:* Versions 12.0(1)xa3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0\(1\)xb:*:*:*:*:*:*:* Versions 12.0(1)xb Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0\(1\)xe:*:*:*:*:*:*:* Versions 12.0(1)xe Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0\(2\)xc:*:*:*:*:*:*:* Versions 12.0(2)xc Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0\(2\)xd:*:*:*:*:*:*:* Versions 12.0(2)xd Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0db:*:*:*:*:*:*:* Versions 12.0db Vulnerable ·Cisco
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios:12.0s:*:*:*:*:*:*:*12.0sVulnerableCisco
cpe:2.3:o:cisco:ios:12.0t:*:*:*:*:*:*:*12.0tVulnerableCisco
  • cpe:2.3:o:cisco:ios:12.0s:*:*:*:*:*:*:* Versions 12.0s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0t:*:*:*:*:*:*:* Versions 12.0t Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-1999-0063
  2. 2026-10-03 Alias added: GHSA-h9f6-v64j-cw96

References

—

  • TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
  • TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
See all 617 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences