RCE in U-Speed T18-21k
CVE-2026-36741
U-SPEED AC1200 Gigabit Wi-Fi Router (Model: T18-21K) V1.0 is vulnerable to Command Injection. The Network Time Protocol (NTP) configuration interface does not properly sanitize user-supplied input. An authenticated user with permission to configure NTP settings can inject arbitrary system commands through crafted input fields. These commands are executed with elevated privileges, leading to potential full system compromise.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.026 · change: +0.005
Affected products
- U-Speed T18-21k
- U-Speed T18-21k Firmware — versions 1.0
Weakness classification (CWE)
References
- github.com/N0tMilk/vulnerability-research (Third Party Advisory)
- github.com/N0tMilk/vulnerability-research/tree/main/IoT/CVE-2026-36741 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-36741?
- CVE-2026-36741 is a high-severity vulnerability in U-Speed T18-21k, classified under Command Injection. CVSS score: 7.2/10. Published 2026-05-13.
- How severe is CVE-2026-36741?
- High severity. CVSS v3 base score is 7.2 out of 10.