VULNERABILITY INTELLIGENCE

CVE-2026-19505

CVSS score9.8 CRITICAL

EPSS probability0.51%

CISA KEVNot currently listed

Published2026-08-19

Last modified2026-09-03

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.