CVE-2026-11834

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.

Affected Software

VendorProductVersion RangeStatus
TP-Link Systems Inc.Archer MR200 v070 < 1.3.0 Build 250605affected
TP-Link Systems Inc.Archer MR200 v80 < 1.5.0 Build 260605affected
TP Link Systems Inc.Archer MR402 v10 < 1.5.0 Build 260605affected
TP-Link Systems Inc.Archer VR2100 v10 < EU_V1_260330affected
TP-Link Systems Inc.Archer C20 v50 < EU_V5_260317affected
TP-Link Systems Inc.Archer C20 v50 < US_V5_260419affected
TP-Link Systems Inc.Archer C20 v60 < V6_260608affected
TP-Link Systems Inc.TL-MR6400 v70 < 1.7.0 Build 260413affected

Weaknesses

  • CWE-78: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References