CVE-2026-19505
RDK-B WebUI improper cryptographic signature verification vulnerability
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | rdk |
| Product | rdk-b webui |
| Published | Aug 19, 2026 |
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Affected Versions
RDK / RDK-B WebUI
rdkb-2025q4-kirkstone