CVE-2026-34122

Vulnerability

Overview

CVE-2026-34122 is a stack-based buffer overflow vulnerability in TP-Link Tapo C520WS v2.6, stemming from insufficient input validation in a configuration handling component. By supplying an excessively long value for a vulnerable configuration parameter, an attacker can overflow a stack buffer, corrupting adjacent memory. [1][3]

Exploitation

An attacker must be on the same network segment as the device and send a crafted HTTP request containing a deliberately oversized configuration parameter. The lack of proper length checks on this input allows the overflow to occur. No prior authentication is required for this attack path, making it accessible to any network-local adversary. [3]

Impact

Successful exploitation leads to a Denial-of-Service (DoS) condition, causing the camera's service process to crash or the device itself to reboot. This disrupts the camera's availability, preventing video streaming, recording, and other monitoring functions. The vulnerability does not appear to allow arbitrary code execution based on the disclosed details. [3]

Mitigation

TP-Link has published a security advisory covering this and related vulnerabilities. Users should apply the latest firmware update for the Tapo C520WS v2.6 via TP-Link's official download center. No other workarounds have been provided, and updating the firmware is the recommended course of action. [1][2][3]