CVE-2026-19505

Improper cryptographic signature verification in jstfunctions.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...

CVE-2026-19505 RDK-B WebUI improper cryptographic signature verification vulnerability

Improper cryptographic signature verification in jstfunctions.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...

CVE-2026-19505

The RDK-B WebUI (version rdkb-2025q4-kirkstone) is vulnerable to an authentication bypass due to improper cryptographic signature verification in jst_functions.c. The root cause is the incorrect handling of the return value from OpenSSL's EVP_VerifyFinal() function, which treats both valid and in...