There is command injection when ddns processes the hostname, which causes the administrator user to obtain the root privilege of the router. This affects Xiaomi router AX1800rom version < 1.0.336 and Xiaomi route RM1800 root version < 1.0.26.
https://privacy.mi.com/trust#/security/vulnerability-management/vulnerability-announcement/detail?id=23&locale=en
Source: Mitre, NVD
Published: 2021-01-13
Updated: 2026-06-17
Base Score: 9
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C
Severity: High
Base Score: 7.2
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.01893