CVE-2026-3227

EUVD-2026-12171

16.03.2026, 14:19

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.

OS Command Injection

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	6.8 MEDIUM	ADJACENT_NETWORK	LOW	HIGH	CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Affected Products (NVD)

Vendor	Product	Version
tp-link	tl-wr802n_firmware	𝑥 < 260304
tp-link	tl-wr841n_firmware	𝑥 < 260303
tp-link	tl-wr840n_firmware	𝑥 < 260304

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

References

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

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

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

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

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

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