CVE-2026-11834
TP-Link · published 2026-06-22
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by TPLink via the CVE Program.
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.
Status at the source
- NVD status: Awaiting Analysis — NVD has not analysed this CVE.
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| TP-Link Systems Inc. | Archer MR200 v07 | 0 – before 1.3.0 Build 250605: affected |
| TP-Link Systems Inc. | Archer MR200 v8 | 0 – before 1.5.0 Build 260605: affected |
| TP Link Systems Inc. | Archer MR402 v1 | 0 – before 1.5.0 Build 260605: affected |
| TP-Link Systems Inc. | Archer VR2100 v1 | 0 – before EU_V1_260330: affected |
| TP-Link Systems Inc. | Archer C20 v5 | 0 – before EU_V5_260317: affected 0 – before US_V5_260419: affected |
| TP-Link Systems Inc. | Archer C20 v6 | 0 – before V6_260608: affected |
| TP-Link Systems Inc. | TL-MR6400 v7 | 0 – before 1.7.0 Build 260413: affected |
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 4.0: 8.7 HIGH — as published by TPLink (Secondary)
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: no · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://mattg.systems/posts/cve-2026-11834/
- https://www.tp-link.com/en/support/download/archer-c20/
- https://www.tp-link.com/en/support/download/archer-mr200/#Firmware
- https://www.tp-link.com/en/support/download/archer-mr402/#Firmware
- https://www.tp-link.com/en/support/download/archer-vr2100/#Firmware
- https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware
- https://www.tp-link.com/us/support/download/archer-c20/
- https://www.tp-link.com/us/support/faq/5141/
Source dates: published 2026-06-22, last changed 2026-06-26. DeSpy's copy of this version is dated 2026-09-28.
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