---
cve: "CVE-2026-19505"
severity: "LOW"
cvss: 3.1
epss: "19%"
vendor: "RDK"
kev: false
exploited: false
published: "2026-08-19 20:17:14"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T13:20:52+02:00"
---

# CVE-2026-19505

> 3.1 LOW

## Beschreibung

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.

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-19505) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_