PT-2026-26110 · D Link · D-Link Wifi Extender Wdr201A

Mstreet97 · Published 2026-03-18 · Updated 2026-03-19 · CVE-2026-30704

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions D-Link WiFi Extender WDR201A versions HW V2.1, FW LFMZX28040922V1.02

Description The WiFi Extender WDR201A, hardware version 2.1, firmware LFMZX28040922V1.02, has an unprotected UART interface accessible through hardware pads on the printed circuit board (PCB). This allows direct access to the device's internal communication channels.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Hidden Functionality

Weakness Enumeration

CWE-912

Related Identifiers

CVE-2026-30704

Affected Products

D-Link Wifi Extender Wdr201A

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-30704 · Security Note
• https://made-in-china.com/showroom/yeapook/#:~:text=Established%20in%202015.%2CDistrict%2C%20Shenzhen%2C%20Guangdong%2C%20China · Note
• https://twitter.com/CVEnew/status/2034520442715660759 · Twitter Post
• https://mstreet97.github.io/security-research/iot/vulnerability-disclosure/cybersecurity/cve/2026/02/18/From-Blackbox-to-Whitebox-Multiple-CVEs-in-a-Consumer-WiFi-Extender.html · Note
• https://twitter.com/VulmonFeeds/status/2034447363129905568 · Twitter Post