CVE-2026-3227 TP-Link — Exploit & Vulnerability Details HIGH

Parameter	Value
CVSS	8.5 (HIGH)
Affected Versions	before 260304
Fixed In	260304
Type	CWE-78 (OS Command Injection)
Vendor	TP-Link
Public PoC	No

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.

Attack Parameters

Attack Vector

Adjacent

Requires local network access

Attack Complexity

Low

Easy to exploit

Attack Requirements

None

No additional conditions

Privileges Required

High

Admin privileges needed

User Interaction

None

No user interaction needed

Impact Assessment

Confidentiality

High

Complete data leak

Integrity

High

Complete data modification

Availability

High

Complete denial of service

CVSS Vector v4.0

Weakness Type (CWE)

CWE-78 OS Command Injection

Vulnerable Products 6

Configuration	From (including)	Up to (excluding)
Tp-Link Tl-Wr802n_Firmware cpe:2.3:o:tp-link:tl-wr802n_firmware::::::::	—	`260304`
Tp-Link Tl-Wr802n cpe:2.3:h:tp-link:tl-wr802n:v4:::::::*	—	—
Tp-Link Tl-Wr841n_Firmware cpe:2.3:o:tp-link:tl-wr841n_firmware::::::::	—	`260303`
Tp-Link Tl-Wr841n cpe:2.3:h:tp-link:tl-wr841n:14:::::::*	—	—
Tp-Link Tl-Wr840n_Firmware cpe:2.3:o:tp-link:tl-wr840n_firmware::::::::	—	`260304`
Tp-Link Tl-Wr840n cpe:2.3:h:tp-link:tl-wr840n:6:::::::*	—	—