CVE-2026-3227

high

Description

A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due to improper neutralization of special elements used in an OS command. In the router configuration import function allows an authenticated attacker to upload a crafted configuration file that results in execution of OS commands with root privileges during port-trigger processing. Successful exploitation allows an authenticated attacker to execute system commands with root privileges, leading to full device compromise.

References

https://www.tp-link.com/us/support/faq/5018/

https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware

https://www.tp-link.com/us/support/download/tl-wr802n/v4/#Firmware

https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware

https://www.tp-link.com/en/support/download/tl-wr840n/v6/#Firmware

https://www.tp-link.com/en/support/download/tl-wr802n/v4/#Firmware

Details

Source: Mitre, NVD

Published: 2026-03-13

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 8.5

Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00419