Unrated severityNVD Advisory· Published Aug 19, 2026

CVE-2026-19505

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

RDK B/WebUIllm-fuzzy
Range: rdkb-2025q4-kirkstone.04.10.26

Patches

Vulnerability mechanics

References

developer.rdkcentral.com/documentation/documentation/rdk_broadband_documentation/components/webui/nvd
whitehats.pwr.edu.pl//blog/2026-08-19-multiple-vulnerabilities-in-rdkb/nvd

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