Vulnerability Details CVE-2026-3227
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 66.6%
CVSS Severity
CVSS v3 Score 6.8
References
- 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
- https://www.tp-link.com/us/support/faq/5018/
Products affected by CVE-2026-3227
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cpe:2.3:h:tp-link:tl-wr802n:v4
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cpe:2.3:h:tp-link:tl-wr840n:6
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cpe:2.3:h:tp-link:tl-wr841n:14
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cpe:2.3:o:tp-link:tl-wr802n_firmware:221008
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cpe:2.3:o:tp-link:tl-wr840n_firmware:-
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cpe:2.3:o:tp-link:tl-wr840n_firmware:0.9.1
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cpe:2.3:o:tp-link:tl-wr840n_firmware:0.9.1.4.16
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cpe:2.3:o:tp-link:tl-wr840n_firmware:0.9.1_3.16
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cpe:2.3:o:tp-link:tl-wr840n_firmware:0.9.1_4.17_v0001.0
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cpe:2.3:o:tp-link:tl-wr840n_firmware:231121
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cpe:2.3:o:tp-link:tl-wr840n_firmware:3.13.27
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cpe:2.3:o:tp-link:tl-wr840n_firmware:6.20_180709
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cpe:2.3:o:tp-link:tl-wr840n_firmware:6_eu_0.9.1_4.16
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cpe:2.3:o:tp-link:tl-wr841n_firmware:-
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cpe:2.3:o:tp-link:tl-wr841n_firmware:0.9.1_4.16
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cpe:2.3:o:tp-link:tl-wr841n_firmware:0.9.1_4.18
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cpe:2.3:o:tp-link:tl-wr841n_firmware:150310
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cpe:2.3:o:tp-link:tl-wr841n_firmware:150616
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cpe:2.3:o:tp-link:tl-wr841n_firmware:201216
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cpe:2.3:o:tp-link:tl-wr841n_firmware:230506
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cpe:2.3:o:tp-link:tl-wr841n_firmware:231119
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cpe:2.3:o:tp-link:tl-wr841n_firmware:241108
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cpe:2.3:o:tp-link:tl-wr841n_firmware:3.13.9
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cpe:2.3:o:tp-link:tl-wr841n_firmware:3.16.9
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cpe:2.3:o:tp-link:tl-wr841n_firmware:4.17.16_build_120201_rel.54750n