CVE-2019-7579: Linksys WRT1900ACS Firmware

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

An issue was discovered on Linksys WRT1900ACS 1.0.3.187766 devices. An ability exists for an unauthenticated user to browse a confidential ui/1.0.99.187766/dynamic/js/setup.js.localized file on the router's webserver, allowing for an attacker to identify possible passwords that the system uses to set the default guest network password. An attacker can use this list of 30 words along with a random 2 digit number to brute force their access onto a router's guest network.

Affected products

• Linksys WRT1900ACS Firmware: version 1.0.3.187766 only

Published 2019-06-17. Last modified 2026-06-17.