CVE-2026-34118: Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C100, C101 & C520WS
A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally supplied HTTP input.
An attacker on the same network segment could trigger heap memory corruption conditions by sending crafted payloads that cause write operations beyond allocated buffer boundaries. Successful exploitation causes a Denial-of-Service (DoS) condition, causing the device’s process to crash or become unresponsive.
Affected Software
Event History
Frequently Asked Questions
Does an attacker need credentials or user interaction to trigger the issue?
No. The CVSS vector indicates no privileges and no user interaction are required.
What network position does an attacker need?
The attacker must be on the same network segment as the affected device. The provided information does not establish exposure to attackers outside that network segment.