CVE-2026-19683: Unencrypted Credential Transmission in Omada Gateway Dynamic DNS Authentication in Omada Gateways
A vulnerability exists in the Dynamic DNS (DDNS) functionality of TP-Link Omada Gateways. During communication with a third-party DDNS service, authentication credentials are transmitted over an unencrypted channel. An attacker who can observe or manipulate traffic between an affected device and the DDNS service may obtain sensitive authentication information or interfere with DDNS update operations. Exploitation requires DDNS to be configured, communication with an external DDNS service, and attacker visibility or control of the relevant network path.
Successful exploitation may result in disclosure of DDNS account credentials, unauthorized access to DDNS management functionality, or modification of DNS records associated with the affected deployment.
Affected Software
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Exposure requires an affected Omada Gateway to have DDNS configured and to communicate with an external third-party DDNS service. Gateways without configured DDNS are not described as exposed.
What access does an attacker need to exploit it?
An attacker must be able to observe or manipulate traffic on the network path between the gateway and the DDNS service. The issue concerns credentials sent over an unencrypted channel during DDNS authentication.
What could an attacker do with intercepted credentials?
They may obtain DDNS account credentials, access DDNS management functionality without authorization, or modify DNS records associated with the deployment.
What can be done while a fix is not available?
The provided information supports removing or disabling DDNS configuration to eliminate the described vulnerable communication. Restricting an attacker's ability to observe or control the relevant network path also reduces exposure.