What is CVE-2026-36738?

CVE-2026-36738 is a medium-severity vulnerability in U-speed T18-21k, classified under Improper Access Control. CVSS score: 6.8/10. Published 2026-05-13.

How severe is CVE-2026-36738?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in U-speed T18-21k

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 acce…

EPSS: 0.003 (21.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

U-speed T18-21k
U-speed T18-21k_firmware — versions 1.0
N/a — versions n/a

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

cve@mitre.org (Third Party Advisory)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-36738?: CVE-2026-36738 is a medium-severity vulnerability in U-speed T18-21k, classified under Improper Access Control. CVSS score: 6.8/10. Published 2026-05-13.
How severe is CVE-2026-36738?: Medium severity. CVSS v3 base score is 6.8 out of 10.