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CVE-2026-17250

Authenticated Remote Code Execution via Stack-Based Buffer Overflow in Firmware Update Handling

A stack-based buffer overflow vulnerability exists in the firmware update functionality of TL-MR6400 v7 due to unsafe processing of attacker-controlled metadata within a firmware image. Successful exploitation may allow an authenticated attacker to trigger memory corruption and execute arbitrary code on the affected device.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Vendors
Tp-link
Products
Tl-mr6400 V7
CVE-2026-17251

Unauthenticated Denial of Service via Null Pointer Dereference in HTTP Request Parsing

A NULL pointer dereference vulnerability exists in the HTTP request parsing functionality of  TL-MR6400 v7. An unauthenticated remote attacker can trigger the vulnerability by sending a specially crafted HTTP request containing a malformed session cookie header. Successful exploitation may cause the HTTP service process to crash, resulting in a denial-of-service condition and temporary loss of management or CGI functionality until service recovery.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Tp-link
Products
Tl-mr6400 V7
CVE-2026-17252

Unauthenticated Denial of Service via Composed HTTP Parsing and Stack-Based Out-of-Bounds Write Vulnerability in TL-MR6400 Web Management Interface

A stack-based out-of-bounds write vulnerability exists in the login request handling functionality of the administrative web interface of TP-Link TL-MR6400 v7 routers. An unauthenticated adjacent attacker can trigger the vulnerability by sending a specially crafted malformed HTTP request. Successful exploitation may cause the web service process to crash, resulting in a denial-of-service condition and temporary loss of access to the router's web management interface.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Tp-link
Products
Tl-mr6400 V7
CVE-2026-11834

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

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 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Tp-link Tp Link
Products
Archer C20 V5 Archer C20 V6 Archer Mr200 V07 and 4 more