CVE-2026-36959: U-Speed n300 Firmware

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

U-SPEED N300 router V1.0.0 does not implement rate limiting or account lockout protections on the /api/login endpoint. This allows an attacker on the local network to perform unlimited authentication attempts, enabling brute-force attacks against the administrator account and potential unauthorized access to the router management interface.

Affected products

• U-Speed n300 Firmware: version 1.0.0 only

Published 2026-04-30. Last modified 2026-07-05.