High 8.7Published Jun 22, 2026

CVE-2026-11834Unauthenticated Command Injection via DHCP Option Handling in Multiple TP-Link Routers

Updated under an hour ago (Oct 27, 2026, 4:50 PM ET)

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It affects TP-Link Systems Inc. Archer MR200 v07 and 6 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for TP-Link Systems Inc. Archer MR200 v07

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, 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
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: TPLink
NVD analysis: Awaiting Analysis
Record last updated: Jun 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

TP-Link Systems Inc. Archer MR200 v07 tp_link_systems:archer_mr200_v07 (from the name)	before 1.3.0 Build 250605	CNA record
TP-Link Systems Inc. Archer MR200 v8 tp_link_systems:archer_mr200_v8 (from the name)	before 1.5.0 Build 260605	CNA record
TP Link Systems Inc. Archer MR402 v1 tp_link_systems:archer_mr402_v1 (from the name)	before 1.5.0 Build 260605	CNA record
TP-Link Systems Inc. Archer VR2100 v1 tp_link_systems:archer_vr2100_v1 (from the name)	before EU_V1_260330	CNA record
TP-Link Systems Inc. Archer C20 v5 tp_link_systems:archer_c20_v5 (from the name)	before EU_V5_260317; before US_V5_260419	CNA record
TP-Link Systems Inc. Archer C20 v6 tp_link_systems:archer_c20_v6 (from the name)	before V6_260608	CNA record
TP-Link Systems Inc. TL-MR6400 v7 tp_link_systems:tl_mr6400_v7 (from the name)	before 1.7.0 Build 260413	CNA record

References

References

https://www.tp-link.com/en/support/download/archer-c20/	patch
https://www.tp-link.com/en/support/download/archer-mr402/#Firmware	patch
https://www.tp-link.com/en/support/download/archer-mr200/#Firmware	patch
https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware	patch
https://www.tp-link.com/en/support/download/archer-vr2100/#Firmware	patch
https://www.tp-link.com/us/support/download/archer-c20/	patch
https://www.tp-link.com/us/support/faq/5141/	vendor-advisory
https://mattg.systems/posts/cve-2026-11834/

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.