CVE-2026-19506 PUBLISHED

Race condition in check.jst in RDK-B WebUI rdkb-2025q4-kirkstone.04.10.26 allows a remote attacker to gain unauthorized access via concurrent authentication requests that exploit shared authentication state.

• https://developer.rdkcentral.com/documentation/documentation/rdk_broadband_documentation/components/webui/
• https://whitehats.pwr.edu.pl//blog/2026-08-19-multiple-vulnerabilities-in-rdkb/

• CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')