CVE-2026-34118
Severity CVSS v4.0:
HIGH
Type:
CWE-122
Heap-based Buffer Overflow
Publication date:
02/04/2026
Last modified:
02/04/2026
Description
A heap-based buffer overflow vulnerability was identified in TP-Link Tapo 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<br />
on the same network segment could trigger heap memory corruption conditions by<br />
sending crafted payloads that cause write operations beyond allocated buffer<br />
boundaries. Successful exploitation<br />
causes a Denial-of-Service (DoS) condition, causing the device’s process to<br />
crash or become unresponsive.
Impact
Base Score 4.0
7.10
Severity 4.0
HIGH