Security Advisory
CVE-2026-19505
9.8
CRITICAL
Vulnerability Description
Improper cryptographic signature verification in `jst_functions.c` in RDK-B WebUI `rdkb-2025q4-kirkstone.04.10.26` allows a remote attacker to bypass authentication and obtain administrative access via a forged JWT containing an invalid RSA signature.
Published Date
August 19, 2026
Official Source
NIST NVD Advisory