Unencrypted DDNS Credential Transmission in TP-Link Omada Gateway
CVE-2026-19683 Published on August 20, 2026
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.
Vulnerability Analysis
CVE-2026-19683 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Cleartext Transmission of Sensitive Information
The software transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors. Many communication channels can be "sniffed" by attackers during data transmission. For example, network traffic can often be sniffed by any attacker who has access to a network interface. This significantly lowers the difficulty of exploitation by attackers.
Affected Versions
TP-Link Systems Inc. ER7212PC v2:- Before 2.4.3 Build 20260722 Rel.40250 is affected.
- Before 2.4.4 Build 20260630 Rel.14398 is affected.
- Before 2.3.5 Build 20260625 Rel.43136 is affected.
- Before 1.3.4 Build 20260625 Rel.43136 is affected.
- Before 1.4.4 Build 20260625 Rel.43063 is affected.
- Before 1.2.0 Build 20260630 Rel.82947 is affected.
- Before 1.4.1 Build 20260708 Rel.64832 is affected.
- Before 1.2.11 Build 20260723 Rel.41567 is affected.
- Before 1.2.6 Build 20260723 Rel.41321 is affected.
- Before 2.1.11 Build 20260723 Rel.41624 is affected.
- Before 1.1.11 Build 20260723 Rel.41624 is affected.
- Before 1.1.7 Build 20260723 Rel.41712 is affected.
- Before 1.2.0 Build 20260630 Rel.82652 is affected.
- Before 1.2.0 Build 20260630 Rel.83311 is affected.
- Before 1.2.0 Build 20260630 Rel.83347 is affected.
- Before 1.0.2 Build 20260723 Rel.43271 is affected.
- Before 1.0.1 Build 20260722 Rel.16854 is affected.
- Before 1.0.3 Build 20260723 Rel.40931 is affected.
- Before 2.0.4 Build 20260723 Rel.43763 is affected.