TP-Link TL-WR840N EU v6.20 was discovered to contain insecure protections for its UART console. This vulnerability allows attackers to connect to the UART port via a serial connection and execute commands as the root user without authentication.
https://k4m1ll0.com/cve-tplink-tlwr840N-uart-shell.html
Source: Mitre, NVD
Published: 2022-05-25
Updated: 2026-06-17
Base Score: 7.2
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
Severity: High
Base Score: 6.8
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Medium
EPSS: 0.00043