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I. Basic Information for CVE-2026-3841
Vulnerability Information

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Vulnerability Title
Command Injection Vulnerability in Telnet CLI on TP-Link TL-MR6400
Source: NVD (National Vulnerability Database)
Vulnerability Description
A command injection vulnerability has been identified in the Telnet command-line interface (CLI) of TP-Link TL-MR6400 v5.3. This issue is caused by insufficient sanitization of data processed during specific CLI operations. An authenticated attacker with elevated privileges may be able to execute arbitrary system commands. Successful exploitation may lead to full device compromise, including potential loss of confidentiality, integrity, and availability.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
TP-Link TL-MR6400 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-Link TL-MR6400是中国普联(TP-Link)公司的一款无线路由器。 TP-Link TL-MR6400 v5.3版本存在安全漏洞,该漏洞源于Telnet CLI中数据清理不足,可能导致命令注入攻击。
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
VendorProductAffected VersionsCPESubscribe
TP-Link Systems Inc.TL-MR6400 v5.3 0 ~ 1.9.0 Build 260108 -
II. Public POCs for CVE-2026-3841
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III. Intelligence Information for CVE-2026-3841
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