CVE-2021-3017: Intelbras Win 300 Firmware

High severity, CVSS 7.5. EPSS: 63% chance of exploitation in the next 30 days.

The web interface on Intelbras WIN 300 and WRN 342 devices through 2021-01-04 allows remote attackers to discover credentials by reading the def_wirelesspassword line in the HTML source code.

Affected products

• Intelbras Win 300 Firmware: up to and including 2021-01-04
• Intelbras Wrn 342 Firmware: up to and including 2021-01-04

Published 2021-04-14. Last modified 2026-06-17.