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Vulnerability record · CVE-2026-19683 · published 20 August 2026

CVE-2026-19683: Tp-link er7212pc firmware cleartext transmission vulnerability

Tp Link · Er7212pc Firmware

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.

6.3 CVSS 4.0 Medium EPSS 0.25% · top 85.4% CWE-319 · Cleartext transmission
6.3CVSS 4.0 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
18Affected product versions listed by NVD
3References
8 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

18 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2026-19586Tp-link er7212pc firmware os command injection vulnerabilityA pre-authentication OS command injection vulnerability has been identified in Omada gateways configured to operate as an OpenVPN Server due to insuf…EPSS 5.7%6.0CVE-2026-9033Tp-link er7212pc firmware missing authentication for critical function vulnerabilityAn unauthenticated attacker with network access to the captive portal service of an affected device can terminate active captive portal sessions, inc…EPSS 0.28%6.0CVE-2025-9290Tp-link omada controller vulnerabilityAn authentication weakness was identified in Omada Controllers, Gateways and Access Points, controller-device adoption due to improper handling of ra…EPSS 0.22%

Source: NIST National Vulnerability Database (record CVE-2026-19683), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.