CVE-2026-3227

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.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.9 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.tp-link.com/en/support/download/tl-wr802n/v4/#Firmware	Product
https://www.tp-link.com/en/support/download/tl-wr840n/v6/#Firmware	Product
https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware	Product
https://www.tp-link.com/us/support/download/tl-wr802n/v4/#Firmware	Product
https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware	Product
https://www.tp-link.com/us/support/faq/5018/	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:tp-link:tl-wr802n_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:tp-link:tl-wr802n:v4:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:tp-link:tl-wr841n_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:tp-link:tl-wr841n:14:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:tp-link:tl-wr840n_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:tp-link:tl-wr840n:6:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-16 14:19

Updated : 2026-07-01 18:16

NVD link : CVE-2026-3227

Mitre link : CVE-2026-3227

CVE.ORG link : CVE-2026-3227

JSON object : View

Products Affected

tp-link

tl-wr802n_firmware
tl-wr841n_firmware
tl-wr841n
tl-wr840n
tl-wr840n_firmware
tl-wr802n

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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