A command
injection vulnerability has been identified in the DHCP option processing logic
in multiple TP-Link router models, due to insufficient validation of externally
supplied DHCP option data. An adjacent attacker may exploit this
vulnerability by supplying crafted DHCP responses, potentially resulting in unauthorized
command execution during device initialization or provisioning workflows. This
typically occurs when the device is in a factory-default or unconfigured state.
Successful exploitation may allow an adjacent, unauthenticated attacker to execute arbitrary commands with elevated privileges, potentially leading to full compromise of the affected device and unauthorized administrative control.
Attack Parameters
Attack Vector
Adjacent
Requires local network access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No 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)
References 8
https://mattg.systems/posts/cve-2026-11834/
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https://www.tp-link.com/en/support/download/archer-c20/
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https://www.tp-link.com/en/support/download/archer-mr200/#Firmware
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https://www.tp-link.com/en/support/download/archer-mr402/#Firmware
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https://www.tp-link.com/en/support/download/archer-vr2100/#Firmware
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https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware
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https://www.tp-link.com/us/support/download/archer-c20/
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https://www.tp-link.com/us/support/faq/5141/
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