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CVE-2026-11834NVD
Vulnerability Summary
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.
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.
CVSS v4.0 Base Metrics — Score 8.7 (HIGH)
Attack VectorAdjacent
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
Affected & Patched Versions
- TP-Link Systems Inc. Archer MR200 v07 < 1.3.0 Build 250605
- TP-Link Systems Inc. Archer MR200 v8 < 1.5.0 Build 260605
- TP Link Systems Inc. Archer MR402 v1 < 1.5.0 Build 260605
- TP-Link Systems Inc. Archer VR2100 v1 < EU_V1_260330
- TP-Link Systems Inc. Archer C20 v5 < EU_V5_260317
- TP-Link Systems Inc. Archer C20 v5 < US_V5_260419
- TP-Link Systems Inc. Archer C20 v6 < V6_260608
- TP-Link Systems Inc. TL-MR6400 v7 < 1.7.0 Build 260413
- TP-Link Systems Inc. Archer MR200 v07 1.3.0 Build 250605
- TP-Link Systems Inc. Archer MR200 v8 1.5.0 Build 260605
- TP Link Systems Inc. Archer MR402 v1 1.5.0 Build 260605
- TP-Link Systems Inc. Archer VR2100 v1 EU_V1_260330
- TP-Link Systems Inc. Archer C20 v5 EU_V5_260317
- TP-Link Systems Inc. Archer C20 v5 US_V5_260419
- TP-Link Systems Inc. Archer C20 v6 V6_260608
- TP-Link Systems Inc. TL-MR6400 v7 1.7.0 Build 260413
External References
- https://www.tp-link.com/en/support/download/archer-c20/
- https://www.tp-link.com/en/support/download/archer-mr402/#Firmware
- https://www.tp-link.com/en/support/download/archer-mr200/#Firmware
- https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware
- https://www.tp-link.com/en/support/download/archer-vr2100/#Firmware
- https://www.tp-link.com/us/support/download/archer-c20/
- https://www.tp-link.com/us/support/faq/5141/
- https://mattg.systems/posts/cve-2026-11834/