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CVE-2026-3227— Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N

Quick assessment

Affected
TP-Link Systems Inc. TL-WR802N v4
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TP-LINK TL-WR802N等都是中国普联（TP-LINK）公司的产品。TP-LINK TL-WR802N是一个无线路由器。TP-LINK TL-WR840N是一款无线路由器。TP-Link TL-WR841N等都是中国普联（TP-Link）公司的产品。TP-Link TL-WR841N是一款路由器。 TP-LINK多款产品存在安全漏洞，该漏洞源于路由器配置导入功能中对特殊元素的中和不当，可能导致经过身份验证的攻击者执行具有root权限的OS命令。以下产品及版本受到影响：TP-Link TL-WR8

AI Predicted 8.4 Difficulty: Easy EPSS 1.12% · P63

Affected Version Matrix 3

VendorProduct Version RangeStatus
TP Link Systems Inc. TL-WR840N v6 < V6_260304 affected
TP-Link Systems Inc. TL-WR802N v4 < V4_260304 affected
TP-Link Systems Inc. TL-WR841N v14 < V14_260303 affected
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I. Basic Information for CVE-2026-3227

Vulnerability Information
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Vulnerability Title
Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
TP-LINK多款产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-LINK TL-WR802N等都是中国普联（TP-LINK）公司的产品。TP-LINK TL-WR802N是一个无线路由器。TP-LINK TL-WR840N是一款无线路由器。TP-Link TL-WR841N等都是中国普联（TP-Link）公司的产品。TP-Link TL-WR841N是一款路由器。 TP-LINK多款产品存在安全漏洞，该漏洞源于路由器配置导入功能中对特殊元素的中和不当，可能导致经过身份验证的攻击者执行具有root权限的OS命令。以下产品及版本受到影响：TP-Link TL-WR8
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TP-Link Systems Inc. TL-WR802N v4 0 ~ V4_260304 -
TP-Link Systems Inc. TL-WR841N v14 0 ~ V14_260303 -
TP Link Systems Inc. TL-WR840N v6 0 ~ V6_260304 -

II. Public POCs for CVE-2026-3227

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III. Intelligence Information for CVE-2026-3227

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Vendor Advisories for CVE-2026-3227 (1)

Vendor Pages for CVE-2026-3227 (5)

IV. Related Vulnerabilities

Same vendor: TP-Link Systems Inc.
Same weakness: CWE-78

V. Comments for CVE-2026-3227

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