CVE-2026-36738

U-SPEED AC1200 Gigabit Wi-Fi Router (Model: T18-21K) V1.0 is vulnerable to Incorrect Access Control. The device exposes a UART interface that lacks authentication, authorization, or access control mechanisms. An attacker with physical access to the UART pins can connect to the interface and gain unrestricted access to device functionality.

Score

CVSS 3.1 6.8 Medium

Status

Analyzed - cve@mitre.org

Published

2026-05-13

Last modified

2026-05-14

Weaknesses

CWE-284

Affected products

• T18-21k Firmware (U-speed)

References

• https://github.com/N0tMilk/vulnerability-research
• https://github.com/N0tMilk/vulnerability-research/tree/main/IoT/CVE-2026-36738