What’s Vulnerable › Vulnerabilities

CVE-1999-0159

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 1998-08-12 · updated 2026-06-16
• Weakness: CWE-400

Description

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.

Affected products

• Cisco IOS: 9.1, 11.0(20.3), 11.1(15)ca, 11.1(16), 11.1(16)aa, 11.1(16)ia (+10)

References

• https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0159
• https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0159

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