CVE-1999-0791: Hybrid Network Cable Modem

High severity, CVSS 10.0. EPSS: 3.8% chance of exploitation in the next 30 days.

Hybrid Network cable modems do not include an authentication mechanism for administration, allowing remote attackers to compromise the system through the HSMP protocol.

Affected products

• Hybrid Network Cable Modem: any version
• Hybrid Network Hsmp: any version

Published 1999-10-06. Last modified 2026-06-16.