CVE-2026-19508
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductRDK-B WebUI
PublishedAug 19, 2026
First seenAug 19, 2026
Weakness typeCWE-119Memory buffer bounds error
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| RDK RDK-B WebUI | rdkb-2025q4-kirkstone | — |
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