CVE-2006-7121: Linksys SPA921

High severity, CVSS 7.8. EPSS: 2% chance of exploitation in the next 30 days.

The HTTP server in Linksys SPA-921 VoIP Desktop Phone allows remote attackers to cause a denial of service (reboot) via (1) a long URL, or a long (2) username or (3) password during Basic Authentication.

Affected products

• Linksys SPA921: version 1.0.0 only

Published 2007-03-06. Last modified 2026-06-16.