CVE-2026-3227highCWE-78

CVE-2026-3227: high-severity vulnerability in TP-Link Systems Inc. TL-WR802N v4

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

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.5epss 3.0%
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:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
TP Link Systems Inc. · TL-WR840N v6TP-Link Systems Inc. · TL-WR802N v4TP-Link Systems Inc. · TL-WR841N v14
Related CVEs — TP-Link Systems Inc. TL-WR802N v4

In the same product, most dangerous first.

CVE-2026-9105MEDIUMAuthenticated Stack-Based Buffer Overflow in TP-Link TL-WR841N Web InterfaceEPSS 1.1%CVE-2025-9014MEDIUMNull Pointer Dereference Vulnerability on TL-WR841NEPSS 0.5%CVE-2026-3622HIGHDenial-of-Service Vulnerability in UPnP Component of TP Link's TL-WR841NEPSS 0.4%