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CVE-2026-76653

Missing Authentication in VPN Configuration Management in TP-Link TL-MR6400 and Archer MR600

A missing authentication vulnerability in the VPN configuration management has been identified in Archer MR600 (v2, v3 & v5) and TL-MR6400 v8 due to improper access control; a remote unauthenticated attacker may be able to access and modify VPN configuration information without valid credentials. Successful exploitation may allow a remote unauthenticated attacker to disclose and modify VPN configuration information.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Tp-link
Products
Archer Mr600 Tl-mr6400 V8
CVE-2026-76652

Authenticated Directory Traversal Vulnerability in File Upload Functionality in TP-Link TL-MR6400 and Archer MR600

An authenticated directory traversal vulnerability in file upload functionality has been identified in Archer MR600 (v2, v3 & v5) and TL-MR6400 v8. Due to insufficient validation of user-supplied file information, an authenticated remote attacker with access to the affected upload functionality could upload a specially crafted file and cause it to be written outside the intended directory. Successful exploitation could allow an authenticated remote attacker to write files to unintended locations, potentially overwriting or modifying files accessible to the affected service; arbitrary code execution has not been demonstrated.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Tp-link
Products
Archer Mr600 Tl-mr6400 V8
CVE-2026-8619

Unauthenticated Denial-of-Service Vulnerability in HTTP Service in TP-Link TL-MR100, TL-MR150, TL-MR6400 and Archer MR600

An unauthenticated denial-of-service vulnerability was identified in TP-Link TL-MR100 v3.2, TL-MR150 v3.2, TL-MR6400 v8.0 and Archer MR600 v2, due to improper handling of exceptional request conditions that may lead to a NULL pointer dereference.  A remote attacker on an adjacent network can send a specially crated HTTP request to trigger a crash of the HTTP service process. Successful exploitation may cause the HTTP service to crash, making the web management interface and HTTP-dependent functionality temporarily unavailable.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Tp-link
Products
Archer Mr600 Archer Mr600 Firmware Tl-mr100 and 5 more
CVE-2026-12339

Authenticated Arbitrary File Write Vulnerability in multiple devices

A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences. An authenticated administrator may overwrite arbitrary files on the system.Successful exploitation may allow arbitrary file to be overwritten on the underlying system, affecting system integrity and availability.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Tp-link
Products
Archer Mr200 V07 Archer Mr600 V2 Tl-mr6400 V5.3
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
CVE-2026-3841

Command Injection Vulnerability in Telnet CLI on TP-Link TL-MR6400

A command injection vulnerability has been identified in the Telnet command-line interface (CLI) of TP-Link TL-MR6400 v5.3. This issue is caused by insufficient sanitization of data processed during specific CLI operations. An authenticated attacker with elevated privileges may be able to execute arbitrary system commands. Successful exploitation may lead to full device compromise, including potential loss of confidentiality, integrity, and availability.

CVSS 4.0 · 8.5 High EPSS 1.9% KEV · Not listed
Vendors
Tp-link
Products
Tl-mr6400 Tl-mr6400 Firmware