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CVE-2026-3227

Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N

Published: Mar 13, 2026Updated: Apr 7, 2026 Sources: CVE List NVDCWE-78
NVD MITRE
6.8CVSSMEDIUM
EPSS Score
1.1%
Top 38.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:AAC:LPR:HUI:NS:UC:HI:HA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-78

Affected Products

TL-WR802N v4TP-Link Systems Inc.Networking Infrastructure
TL-WR841N v14TP-Link Systems Inc.Networking Infrastructure
TL-WR840N v6TP Link Systems Inc.
Embedded
Networking Infrastructure / router-switch
tl-wr802n firmwaretp-linkNetworking Infrastructure
tl-wr841n firmwaretp-linkNetworking Infrastructure
tp-link systems inc.commercialCNNetworking Infrastructureaka tp-link
tp link systems inc.commercialCNNetworking Infrastructureaka tp-link, tplink
tp-linkcommercialTWNetworking Infrastructureaka tp-link, tp link
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://www.tp-link.com/en/support/download/tl-wr802n/v4/#Firmware
tp-link.com
https://www.tp-link.com/us/support/download/tl-wr802n/v4/#Firmware
tp-link.com
https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware
tp-link.com
and 3 more references View all →

Timeline

Published
Mar 13, 2026
Last Updated
Apr 7, 2026

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