{"id":"CVE-2026-19683","state":"PUBLISHED","title":"Unencrypted Credential Transmission in Omada Gateway Dynamic DNS Authentication in Omada Gateways","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. \n\n\n\n\n\nSuccessful 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.","publishedAt":"2026-08-20T18:32:27.650Z","updatedAt":"2026-08-20T18:58:42.948Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","source":"TPLink"},"assigner":"TPLink","products":["TP-Link Systems Inc. ER7212PC v2","TP-Link Systems Inc. ER605 v2","TP-Link Systems Inc. ER7206 v2","TP-Link Systems Inc ER7406 v1","TP-Link Systems Inc. ER707-M2 v1","TP-Link Systems Inc ER7412-M2 v1","TP-Link Systems Inc. ER8411 v1","TP-Link Systems Inc. ER706W v1","TP-Link Systems Inc. v1","TP-Link Systems Inc. ER706W-4G v2","TP-Link Systems Inc. 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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. \n\n\n\n\n\nSuccessful 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":[{"vendor":"TP-Link Systems Inc.","product":"ER7212PC v2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.4.3 Build 20260722 Rel.40250","versionType":"custom"}]},{"vendor":"TP-Link Systems Inc.","product":"ER605 v2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.4.4 Build 20260630 Rel.14398","versionType":"custom"}]},{"vendor":"TP-Link Systems Inc.","product":"ER7206 v2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.3.5 Build 20260625 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