Security Advisory: Authenticated OS Command Injection in TL-WR841N IPv6 WAN Configuration (CVE-2026-102294)

Vulnerability and Impact Description:

CVE-2026-102294: Authenticated OS Command Injection in TL-WR841N IPv6 WAN Configuration

TL-WR841N contains an authenticated OS command injection vulnerability in the IPv6 WAN configuration. A crafted IPv6 Gateway value is improperly incorporated into a system command, allowing an authenticated administrator to execute arbitrary operating system commands.

Successful exploitation may allow unauthorized access to sensitive information, modification of device configuration or services, and disruption of device operation.

CVSS v4.0 Score: 8.5 / High

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

Affected Products/Versions and Fixes:

Recommendations:

We strongly recommend that users with affected devices take the following actions:

1. Update affected devices to the latest firmware version that fixed the vulnerability:

EN: Download for TL-WR841N | TP-Link

US: Download for TL-WR841N | TP-Link

Disclaimer:

This advisory is provided for informational purposes only and is subject to change without notice. The information is provided “as is” without warranties of any kind. TP-Link recommends that customers promptly apply available firmware updates or implement documented workarounds as provided in this advisory. Devices/systems that are not updated or mitigated as described may remain vulnerable, and TP-Link disclaims any responsibility or liability for any damages or losses arising from a failure to implement such updates.