CVE-2026-19508RDK WebUI heap-based buffer overflow vulnerability
Updated under an hour ago ()
Does this affect you?
It affects RDK-B WebUI. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Heap-based buffer overflow in the multipart form-data parser in `jst_post.c` in RDK-B WebUI `rdkb-2025q4-kirkstone.04.10.26` allows a remote unauthenticated attacker to cause memory corruption and denial of service, and potentially execute arbitrary code, via a crafted multipart/form-data request.
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-119
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- certcc
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
RDK RDK-B WebUI rdk:b_webui (from the name) | rdkb-2025q4-kirkstone | CNA record |
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/
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.