CVE-2026-3227
Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N
Using TL-WR802N v4 by TP-Link Systems Inc.?
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://www.tp-link.com/en/support/download/tl-wr802n/v4/#Firmware
- https://www.tp-link.com/us/support/download/tl-wr802n/v4/#Firmware
- https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware
- https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware
- https://www.tp-link.com/en/support/download/tl-wr840n/v6/#Firmware
References (6)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- ADJACENT_NETWORK
- Complexity
- LOW
- Privileges
- HIGH
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
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