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CVE-2026-3841

HIGH CVSS 4.0: 8.5
Updated Mar 12, 2026
TP-Link
Parameter Value
CVSS 8.5 (HIGH)
Type CWE-78 (OS Command Injection)
Vendor TP-Link
Public PoC No

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.

Attack Parameters

Attack Vector
Adjacent
Requires local network access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Weakness Type (CWE)