Home/CVE/A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due to imprope
CVE

CVE-2026-3227

A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due to imprope

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.

MEDIUM · CVSS 6.8 EPSS 0.0031
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
▤

Affected Products & Versions

3
tp-link tl-wr802n firmware< 260304
tp-link tl-wr841n firmware< 260303
tp-link tl-wr840n firmware< 260304
▣

Scoring & Timeline

6.8
MEDIUM · CVSS v3.1 · f23511db-6c3e-4e32-a477-6aa17d310630
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Mar 2026 · 02:19 PM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.tp-link.com/en/support/download/tl-wr802n/v4/#FirmwareProduct
https://www.tp-link.com/en/support/download/tl-wr840n/v6/#FirmwareProduct
https://www.tp-link.com/en/support/download/tl-wr841n/v14/#FirmwareProduct
https://www.tp-link.com/us/support/download/tl-wr802n/v4/#FirmwareProduct
https://www.tp-link.com/us/support/download/tl-wr841n/v14/#FirmwareProduct
https://www.tp-link.com/us/support/faq/5018/Vendor Advisory
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