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

Severity: high (CVSS 7.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-20 · updated 2026-10-26
Weakness: CWE-319

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.

Affected products

TP-Link Dr3150 Firmware: before 1.0.1 — fixed in 1.0.1
TP-Link Dr3220V-4G Firmware: before 1.2.0 — fixed in 1.2.0
TP-Link Dr3650V-4G Firmware: before 1.2.0 — fixed in 1.2.0
TP-Link Dr3650V Firmware: before 1.2.0 — fixed in 1.2.0
TP-Link Er603Wp-4G-Outdoor Firmware: before 1.0.2 — fixed in 1.0.2
TP-Link Er605 Firmware: before 2.4.4 — fixed in 2.4.4
TP-Link Er605W Firmware: before 2.0.4 — fixed in 2.0.4
TP-Link Er701-5G-Outdoor Firmware: before 1.0.3 — fixed in 1.0.3
TP-Link Er703Wp-4G-Outdoor Firmware: before 1.1.7 — fixed in 1.1.7
TP-Link Er706W-4G Firmware: before 1.2.6; before 2.1.11 — fixed in 1.2.6, 2.1.11
TP-Link Er706W Firmware: before 1.2.11 — fixed in 1.2.11
TP-Link Er706Wp-4G Firmware: before 1.1.11 — fixed in 1.1.11
TP-Link Er707-M2 Firmware: before 1.4.4 — fixed in 1.4.4
Tp-Link ER7206 Omada Gigabit VPN Router: before 2.3.5 — fixed in 2.3.5
TP-Link Er7212Pc Firmware: before 2.4.3 — fixed in 2.4.3
TP-Link Er7406 Firmware: before 1.3.4 — fixed in 1.3.4
TP-Link Er7412-M2 Firmware: before 1.2.0 — fixed in 1.2.0
TP-Link Er8411 Firmware: before 1.4.1 — fixed in 1.4.1

How to fix

Upgrade to a fixed version: TP-Link Dr3150 Firmware 1.0.1; TP-Link Dr3220V-4G Firmware 1.2.0; TP-Link Dr3650V-4G Firmware 1.2.0; TP-Link Dr3650V Firmware 1.2.0; TP-Link Er603Wp-4G-Outdoor Firmware 1.0.2; TP-Link Er605 Firmware 2.4.4; TP-Link Er605W Firmware 2.0.4; TP-Link Er701-5G-Outdoor Firmware 1.0.3; TP-Link Er703Wp-4G-Outdoor Firmware 1.1.7; TP-Link Er706W-4G Firmware 1.2.6, 2.1.11; TP-Link Er706W Firmware 1.2.11; TP-Link Er706Wp-4G Firmware 1.1.11. Check the vendor advisory for mitigations.

References

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