CVE-2026-3227
MEDIUM severity · CVSS 6.8 · OS command injection
6.8CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorAdjacent
Attack complexityLow
Privileges requiredHigh
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.tp-link.com/us/support/faq/5018/Advisory
- 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