CVE-2026-19508CWE-119

CVE-2026-19508

Critical · published August 20, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
56.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00810 · 56.5th percentile
Weakness
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published
2026-08-20T00:17Z
References (2)
https://developer.rdkcentral.com/documentation/documentation/rdk_broadband_documentation/components/webui/ · [email protected]https://whitehats.pwr.edu.pl//blog/2026-08-19-multiple-vulnerabilities-in-rdkb/ · [email protected]
EPSS history
Timeline
  • 19 AUG 19:28Z
    RDK WebUI heap-based buffer overflow vulnerability
    cvelistv5