Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-11834

Severity CVSS v4.0:
HIGH
Type:
CWE-78 OS Command Injections
Publication date:
22/06/2026
Last modified:
26/06/2026

Description

A command<br /> injection vulnerability has been identified in the DHCP option processing logic<br /> in multiple TP-Link router models, due to insufficient validation of externally<br /> supplied DHCP option data. An adjacent attacker may exploit this<br /> vulnerability by supplying crafted DHCP responses, potentially resulting in unauthorized<br /> command execution during device initialization or provisioning workflows. This<br /> typically occurs when the device is in a factory-default or unconfigured state.<br /> <br /> <br /> <br /> <br /> <br /> Successful<br /> exploitation may allow an adjacent, unauthenticated attacker to execute<br /> arbitrary commands with elevated privileges, potentially leading to full<br /> compromise of the affected device and unauthorized administrative control.

Impact

Vector 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 CVSS v4.0 Severity and Metrics:

Base Score: 8.70 HIGH
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

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): None
User Interaction (UI): None
Confidentiality (VC): High
Integrity (VI): High
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0
8.70
Severity 4.0
HIGH

References to Advisories, Solutions, and Tools