CVE-2026-19683
Received Received - Intake

Authentication Credential Exposure in TP-Link Omada Gateway DDNS

Publication date: 2026-08-20

Last updated on: 2026-08-20

Assigner: TPLink

Description
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.

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Meta Information

Published
2026-08-20
Last Modified
2026-08-20
Generated
2026-08-20
AI Q&A
2026-08-20
EPSS Evaluated
N/A
NVD
CVE-2026-19683
EUVD
EUVD-2026-63545

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
tp-link omada_gateway *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-319 The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.

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Executive Summary

This vulnerability affects TP-Link Omada Gateways with Dynamic DNS (DDNS) functionality. Authentication credentials for DDNS services are sent over an unencrypted channel, allowing attackers to intercept or alter traffic if they can observe or manipulate network communication.

Detection Guidance

Detecting this vulnerability requires monitoring network traffic for unencrypted DDNS communication. Use packet capture tools like tcpdump or Wireshark to inspect traffic between the Omada Gateway and DDNS services. Look for plaintext transmission of authentication credentials or DNS update requests.

Impact Analysis

An attacker could steal DDNS account credentials, gain unauthorized access to DDNS management, or modify DNS records. This could disrupt network services or redirect traffic to malicious destinations.

Compliance Impact

This vulnerability may lead to unauthorized access to DDNS account credentials or DNS records, which could compromise data integrity and confidentiality. For GDPR, this could result in unauthorized processing of personal data. For HIPAA, exposure of credentials might allow access to protected health information.

Mitigation Strategies

Disable DDNS functionality on the TP-Link Omada Gateway if not required. If DDNS is necessary, ensure the gateway communicates with the DDNS service over a VPN or encrypted tunnel. Update to the latest firmware if a patch is available. Monitor network traffic for suspicious DDNS activity.

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