CVE-2026-36738 — MEDIUM (6.8)

Vulnerability Description

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.

CVSS Score

6.8

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
U-Speed	T18-21K Firmware	1.0
U-Speed	T18-21K	-

Related Weaknesses (CWE)

CWE-284

References

https://github.com/N0tMilk/vulnerability-researchThird Party Advisory
https://github.com/N0tMilk/vulnerability-research/tree/main/IoT/CVE-2026-36738ExploitThird Party Advisory
https://github.com/N0tMilk/vulnerability-research/tree/main/IoT/CVE-2026-36738ExploitThird Party Advisory

FAQ

What is CVE-2026-36738?

CVE-2026-36738 is a vulnerability with a CVSS score of 6.8 (MEDIUM). 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 mec...

How severe is CVE-2026-36738?

CVE-2026-36738 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-36738?

Check the references section above for vendor advisories and patch information. Affected products include: U-Speed T18-21K Firmware, U-Speed T18-21K.