CVE-1999-0159

LowCVSS 3.5

Published: 12/08/1998(UTC)Updated: 16/06/2026(UTC)Translated: 18/06/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Elevated risk

1.08%

61th percentile — higher than 61% of all known CVEs

Summary

Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login). This applies to some IOS 9.x, 10.x, and 11.x releases.

Risk Assessment

Device crashes can lead to service availability interruptions, impacting organizational operations.

Recommendation

It is recommended to restrict access to the interactive prompt and update to the latest IOS versions that mitigate this vulnerability.

Original NVD description (English source)

Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login). This applies to some IOS 9.x, 10.x, and 11.x releases.