CVE-1999-0159: Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login). Thi
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.
Severity
UNKNOWN
Source Attribution
Source: NVD · Updated: 2026-08-21T04:30:40.888Z · 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.