Answer in brief
CVE-2026-11834 records a High severity (CVSS 8.7) vulnerability in Unauthenticated Command Injection via DHCP Option Handling in Multiple TP-Link Routers. The current sources do not mark it as known exploited. The current feed maps TP-Link Systems Inc./Archer C20 v5 (generic), TP-Link Systems Inc./Archer C20 v6 (generic), TP-Link Systems Inc./Archer MR200 v07 (generic), TP-Link Systems Inc./Archer MR200 v8 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-11834 records a High severity (CVSS 8.7) vulnerability in Unauthenticated Command Injection via DHCP Option Handling in Multiple TP-Link Routers. The current sources do not mark it as known exploited. The current feed maps TP-Link Systems Inc./Archer C20 v5 (generic), TP-Link Systems Inc./Archer C20 v6 (generic), TP-Link Systems Inc./Archer MR200 v07 (generic), TP-Link Systems Inc./Archer MR200 v8 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps TP-Link Systems Inc./Archer C20 v5 (generic), TP-Link Systems Inc./Archer C20 v6 (generic), TP-Link Systems Inc./Archer MR200 v07 (generic), TP-Link Systems Inc./Archer MR200 v8 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| TP-Link Systems Inc./Archer C20 v5generic | >=0 <EU_V5_260317 || >=0 <US_V5_260419 | EU_V5_260317, US_V5_260419 |
| TP-Link Systems Inc./Archer C20 v6generic | >=0 <V6_260608 | V6_260608 |
| TP-Link Systems Inc./Archer MR200 v07generic | >=0 <1.3.0 Build 250605 | 1.3.0 Build 250605 |
| TP-Link Systems Inc./Archer MR200 v8generic | >=0 <1.5.0 Build 260605 | 1.5.0 Build 260605 |
| TP Link Systems Inc./Archer MR402 v1generic | >=0 <1.5.0 Build 260605 | 1.5.0 Build 260605 |
| TP-Link Systems Inc./Archer VR2100 v1generic | >=0 <EU_V1_260330 | EU_V1_260330 |
| TP-Link Systems Inc./TL-MR6400 v7generic | >=0 <1.7.0 Build 260413 | 1.7.0 Build 260413 |
Published upstream
Jun 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 22, 2026
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.
Quoted source text, attributed separately from HOL analysis.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps TP-Link Systems Inc./Archer C20 v5 (generic), TP-Link Systems Inc./Archer C20 v6 (generic), TP-Link Systems Inc./Archer MR200 v07 (generic), TP-Link Systems Inc./Archer MR200 v8 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| TP-Link Systems Inc./Archer C20 v5generic | >=0 <EU_V5_260317 || >=0 <US_V5_260419 | EU_V5_260317, US_V5_260419 |
| TP-Link Systems Inc./Archer C20 v6generic | >=0 <V6_260608 | V6_260608 |
| TP-Link Systems Inc./Archer MR200 v07generic | >=0 <1.3.0 Build 250605 | 1.3.0 Build 250605 |
| TP-Link Systems Inc./Archer MR200 v8generic | >=0 <1.5.0 Build 260605 | 1.5.0 Build 260605 |
| TP Link Systems Inc./Archer MR402 v1generic | >=0 <1.5.0 Build 260605 | 1.5.0 Build 260605 |
| TP-Link Systems Inc./Archer VR2100 v1generic | >=0 <EU_V1_260330 | EU_V1_260330 |
| TP-Link Systems Inc./TL-MR6400 v7generic | >=0 <1.7.0 Build 260413 | 1.7.0 Build 260413 |
Published upstream
Jun 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 22, 2026
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.
Quoted source text, attributed separately from HOL analysis.