CVE-2026-19505
Last modified
CVE-2026-19505 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| RDK | RDK-B WebUI | rdkb-2025q4-kirkstone |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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