EUVD-2026-12171CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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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.
Analysis
Authenticated attackers can achieve root-level command execution on TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 routers by uploading a malicious configuration file through the import function, exploiting improper input validation in the port-trigger processing logic. Successful exploitation grants complete control over the affected device, allowing full compromise of the router and any connected network. …
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Remediation
Within 7 days: Identify all affected systems running TP-Link TL-WR802N and apply vendor patches promptly. Validate that input sanitization is in place for all user-controlled parameters.
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