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-2026-19507

Uncontrolled resource consumption in check.jst in RDK-B WebUI rdkb-2025q4-kirkstone.04.10.26 allows a remote unauthenticated attacker to cause denial of service via excessively large password values...

CVE-2026-19508

Heap-based buffer overflow in the multipart form-data parser in jstpost.c in RDK-B WebUI rdkb-2025q4-kirkstone.04.10.26 allows a remote unauthenticated attacker to cause memory corruption and denial of service, and potentially execute arbitrary code, via a crafted multipart/form-data request...

CVE-2026-19508 RDK WebUI heap-based buffer overflow vulnerability

Heap-based buffer overflow in the multipart form-data parser in jstpost.c in RDK-B WebUI rdkb-2025q4-kirkstone.04.10.26 allows a remote unauthenticated attacker to cause memory corruption and denial of service, and potentially execute arbitrary code, via a crafted multipart/form-data request...

CVE-2026-19509

An improper input validation flaw in ajaxSet_wireless_network_configuration.jst in RDK-B WebUI version rdkb-2025q4-kirkstone.04.10.26 allows an authenticated attacker to supply an abnormally large ssid_number value that is passed unvalidated to the RDK-B routing service. This causes memory corrup...

CVE-2026-19509 RDK WebUI DOS vulnerability

Improper input validation in ajaxSetwirelessnetworkconfiguration.jst in RDK-B WebUI rdkb-2025q4-kirkstone.04.10.26 allows an authenticated attacker to cause denial of service via a crafted ssidnumber parameter...

CVE-2026-19506 RDK-B WebUI race condition vulnerability

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...

CVE-2026-19506

CVE-2026-19506 is a race condition in the login process of check.jst in RDK-B WebUI (version rdkb-2025q4-kirkstone.04.10.26). A shared variable stores the password verification result across concurrent requests, so an unauthenticated remote attacker who times their login request to coincide with ...

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...

RDK-B WebUI contains multiple vulnerabilities

Overview RDK Central RDK-B WebUI version, rdkb-2025q4-kirkstone, contains multiple vulnerabilities involving memory corruption, improper authentication, race conditions, and insufficient input validation. An attacker with network access to an affected WebUI may be able to bypass authentication,...