CVE-2026-11834 PUBLISHED

Unauthenticated Command Injection via DHCP Option Handling in Multiple TP-Link Routers

Assigner: TPLink
Reserved: 09.06.2026 Published: 22.06.2026 Updated: 23.06.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Product Status

Vendor TP-Link Systems Inc.
Product Archer MR200 v07
Versions Default: unaffected
  • affected from 0 to 1.3.0 Build 250605 (excl.)
Vendor TP-Link Systems Inc.
Product Archer MR200 v8
Versions Default: unaffected
  • affected from 0 to 1.5.0 Build 260605 (excl.)
Vendor TP Link Systems Inc.
Product Archer MR402 v1
Versions Default: unaffected
  • affected from 0 to 1.5.0 Build 260605 (excl.)
Vendor TP-Link Systems Inc.
Product Archer VR2100 v1
Versions Default: unaffected
  • affected from 0 to EU_V1_260330 (excl.)
Vendor TP-Link Systems Inc.
Product Archer C20 v5
Versions Default: unaffected
  • affected from 0 to EU_V5_260317 (excl.)
  • affected from 0 to US_V5_260419 (excl.)
Vendor TP-Link Systems Inc.
Product Archer C20 v6
Versions Default: unaffected
  • affected from 0 to V6_260608 (excl.)
Vendor TP-Link Systems Inc.
Product TL-MR6400 v7
Versions Default: unaffected
  • affected from 0 to 1.7.0 Build 260413 (excl.)

Credits

  • Matt Graham (mattg.systems) finder

References

Problem Types

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

Impacts

  • CAPEC-88 OS Command Injection