Vulnerability · Published Aug 19, 2026 · Assigned by certcc
CVE-2026-19509RDK WebUI DOS vulnerability
Medium 6.5
In plain English
A medium-severity improper input validation in RDK-B WebUI from RDK. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 62.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper input validation in `ajaxSet_wireless_network_configuration.jst` in RDK-B WebUI `rdkb-2025q4-kirkstone.04.10.26` allows an authenticated attacker to cause denial of service via a crafted `ssid_number` parameter.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| RDK | RDK-B WebUI | rdkb-2025q4-kirkstone |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H