CVE-2026-11834
Unauthenticated Command Injection via DHCP Option Handling in Multiple TP-Link Routers
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.
INFO
Published Date :
June 22, 2026, 7:16 p.m.
Last Modified :
June 26, 2026, 10:16 p.m.
Remotely Exploit :
No
Source :
f23511db-6c3e-4e32-a477-6aa17d310630
Affected Products
The following products are affected by CVE-2026-11834
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | f23511db-6c3e-4e32-a477-6aa17d310630 | ||||
| CVSS 4.0 | HIGH | f23511db-6c3e-4e32-a477-6aa17d310630 |
Solution
- Apply vendor patches for affected TP-Link router models.
- Validate all external DHCP option data rigorously.
- Restrict network access to unconfigured devices.
- Disable DHCP server if not required.
Public PoC/Exploit Available at Github
CVE-2026-11834 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-11834.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-11834 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-11834
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Proof of Concept (PoC) for the TP-Link DHCP Option 66 Unauthenticated RCE (CVE-2026-11834)
Python
Resources to getting started vulnerability research on IoT/embedded devices.
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-11834 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-11834 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by f23511db-6c3e-4e32-a477-6aa17d310630
Jun. 26, 2026
Action Type Old Value New Value Added Reference https://mattg.systems/posts/cve-2026-11834/ -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 23, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-11834', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-22T19:54:35.543636Z'} {'id': 'CVE-2026-11834', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-22T00:00:00+00:00'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 22, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-11834', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-22T19:54:35.543636Z'} -
New CVE Received by f23511db-6c3e-4e32-a477-6aa17d310630
Jun. 22, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'TP-Link Systems Inc.', 'product': 'Archer MR200 v07', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.3.0 Build 250605', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'Archer MR200 v8', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.5.0 Build 260605', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP Link Systems Inc.', 'product': 'Archer MR402 v1', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.5.0 Build 260605', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'Archer VR2100 v1', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': 'EU_V1_260330', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'Archer C20 v5', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': 'EU_V5_260317', 'versionType': 'custom'}, {'status': 'affected', 'version': '0', 'lessThan': 'US_V5_260419', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'Archer C20 v6', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': 'V6_260608', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'TL-MR6400 v7', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.7.0 Build 260413', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 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 Added CWE CWE-78 Added Reference https://www.tp-link.com/en/support/download/archer-c20/ Added Reference https://www.tp-link.com/en/support/download/archer-mr200/#Firmware Added Reference https://www.tp-link.com/en/support/download/archer-mr402/#Firmware Added Reference https://www.tp-link.com/en/support/download/archer-vr2100/#Firmware Added Reference https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware Added Reference https://www.tp-link.com/us/support/download/archer-c20/ Added Reference https://www.tp-link.com/us/support/faq/5141/