CVE-2026-19505
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| RDK | RDK-B WebUI | rdkb-2025q4-kirkstone | affected |
Weaknesses
- CWE-347 Improper Verification of Cryptographic Signature
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: total
References
- https://whitehats.pwr.edu.pl//blog/2026-08-19-multiple-vulnerabilities-in-rdkb/
- https://developer.rdkcentral.com/documentation/documentation/rdk_broadband_documentation/components/webui/
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