CVE-2026-11834 | A command injection vulnerability has been identified in the… | CVSS 8.7 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-11834
State: PUBLISHED
Assigner: TPLink
Reserved: 2026-06-09 22:14 UTC
Published: 2026-06-22 17:53 UTC
Last updated: 2026-06-22 19:54 UTC
Primary CWE: CWE-78
CWE-78 Improper neutralization of special elements used in a…
Vendor / Product: TP-Link Systems Inc. / Archer MR200 v07
Sources: cve.org · NVD

Severity & Metrics

8.7 HIGH CVSS 4.0

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (7)

Vendor	Product	Platform	Versions
TP Link Systems Inc.	Archer MR402 v1	—	0 < 1.5.0 Build 260605
TP-Link Systems Inc.	Archer C20 v5	—	0 < EU_V5_260317, 0 < US_V5_260419
TP-Link Systems Inc.	Archer C20 v6	—	0 < V6_260608
TP-Link Systems Inc.	Archer MR200 v07	—	0 < 1.3.0 Build 250605
TP-Link Systems Inc.	Archer MR200 v8	—	0 < 1.5.0 Build 260605
TP-Link Systems Inc.	Archer VR2100 v1	—	0 < EU_V1_260330
TP-Link Systems Inc.	TL-MR6400 v7	—	0 < 1.7.0 Build 260413

Weakness (CWE)

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

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.7	HIGH	4.0	cna	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

References (7)