CVE-2026-3227
Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N
- State
- Published
- Severity
- 8.5 High
- Published
- Mar 13, 2026
- Updated
- Jul 1, 2026
- Reserved
- Feb 25, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 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 | TPLink |
Weaknesses
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products
| Product | Versions |
|---|---|
TL-WR802N v4TP-Link Systems Inc. |
|
TL-WR841N v14TP-Link Systems Inc. |
|
TL-WR840N v6TP Link Systems Inc. |
|
References
- https://www.tp-link.com/en/support/download/tl-wr802n/v4/#Firmwarepatch
- https://www.tp-link.com/us/support/download/tl-wr802n/v4/#Firmwarepatch
- https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmwarepatch
- https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmwarepatch
- https://www.tp-link.com/en/support/download/tl-wr840n/v6/#Firmwarepatch
- https://www.tp-link.com/us/support/faq/5018/vendor-advisory
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