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

CVE-2026-19505 is a CRITICAL (CVSS 9.8) improper cryptographic signature verification flaw in RDK-B WebUI version rdkb-2025q4-kirkstone.04.10.26. The vulnerability resides in javascript-templates/source/jst_functions.c, where the code incorrectly checks the return value of OpenSSL's EVP_VerifyFin...