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Vulnerability record · CVE-2026-36741 · published 13 May 2026

CVE-2026-36741: U-speed t18-21k firmware command injection vulnerability

UU Speed · T18 21k Firmware

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.

7.2 CVSS 3.1 High EPSS 2.6% · top 15.2% CWE-77 · Command injection
7.2CVSS 3.1 base score
2.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
30 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/N0tMilk/vulnerability-research Third Party Advisory
https://github.com/N0tMilk/vulnerability-research/tree/main/IoT/CVE-2026-36741 ExploitThird Party Advisory
https://github.com/N0tMilk/vulnerability-research/tree/main/IoT/CVE-2026-36741 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-36741), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.