TP-Link WR841N Router multiple vulnerabilities

RISK EVALUATION Multiple TP-Link products TP-Link Archer C20 V5, Archer C20 6.0, Archer AX53 v1.0 and TL-WR841N v13 are affected by multiple vulnerabilities. The most severe of these vulnerabilities could allow an adjacent, unauthenticated attacker to execute administrative commands. 2...

CVE-2026-5039

TP-Link TL-WR841N v13 uses DES-CBC encryption in the TDDPv2 debug protocol with a cryptographic key derived from default web management credentials, making the key predictable if device is left in default configuration. A network-adjacent attacker can exploit this weakness to gain unauthorized...

CVE-2026-5039: Use of Default Cryptographic Key

TP-Link TL-WR841N v13 uses DES-CBC encryption in the TDDPv2 debug protocol with a cryptographic key derived from default web management credentials, making the key predictable if device is left in default configuration. A network-adjacent attacker can exploit this weakness to gain unauthorized...

Russian hacking group targets home and small office routers to spy on users

British security officials found that a group linked to the Russian military is spying on users of compromised Small Office/Home Office SOHO routers in a broad cyber espionage campaign. A Microsoft blog goes into the technical details of these attacks. The group, which we’ll refer to as APT28, bu...

CVE-2026-3622

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition. This...

EUVD-2026-16419

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition. This...

CVE-2026-3622

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition. This...

CVE-2026-3622

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition. This...

CVE-2026-3622 Denial-of-Service Vulnerability in UPnP Component of TP Link's TL-WR841N

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition. This...

CVE-2026-3622

CVE-2026-3622 affects TL-WR841N v14's UPnP component, where improper input validation triggers an out-of-bounds read that can crash the UPnP service and cause a Denial-of-Service. Affected builds include EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and US_0.9.1.4.19 Build 260312 Rel. 49108n...

PT-2026-28636

Name of the Vulnerable Software and Affected Versions TP-Link TL-WR841N version 14 versions prior to EN 0.9.1 4.19 Build 260303 Rel.42399n V14 260303 TP-Link TL-WR841N version 14 versions prior to US 0.9.1.4.19 Build 260312 Rel. 49108n V14 0304 Description The issue resides within the UPnP...

CVE-2026-3622: Out-of-bounds Read

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition. This...

CVE-2026-3227: Improper Neutralization of Special Elements used in an OS Command

A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due to improper neutralization of special elements used in an OS command. In the router configuration import function allows an authenticated attacker to upload a crafted configuration file...

CVE-2026-3227 Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N

A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due to improper neutralization of special elements used in an OS command. In the router configuration import function allows an authenticated attacker to upload a crafted configuration file...

CVE-2026-3227

Technical details beyond the brief description are not provided in the supplied documents. Monitor for updates on affected devices and firmware.

CVE-2026-3227

A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due to improper neutralization of special elements used in an OS command. In the router configuration import function allows an authenticated attacker to upload a crafted configuration file...

CVE-2026-0834: Authentication Bypass by Spoofing

Logic vulnerability in TP-Link Archer C20 v5, 6.0, Archer AX53 v1.0 and TL-WR841N v13 TDDP module allows unauthenticated adjacent attackers to execute administrative commands including factory reset and device reboot without credentials. Attackers on the adjacent network can remotely trigger...

CVE-2025-9014

A Null Pointer Dereference vulnerability exists in the referer header check of the web portal of TP-Link TL-WR841N v14, caused by improper input validation. A remote, unauthenticated attacker can exploit this flaw and cause Denial of Service on the web portal service.This issue affects TL-WR841N...

CVE-2025-9014

A Null Pointer Dereference vulnerability exists in the referer header check of the web portal of TP-Link TL-WR841N v14, caused by improper input validation. A remote, unauthenticated attacker can exploit this flaw and cause Denial of Service on the web portal service.This issue affects TL-WR841N...

CVE-2025-9014

A Null Pointer Dereference vulnerability exists in the referer header check of the web portal of TP-Link TL-WR841N v14, caused by improper input validation. A remote, unauthenticated attacker can exploit this flaw and cause Denial of Service on the web portal service.This issue affects TL-WR841N...