CVE-2026-34122 HIGH

CVE-2026-34122: Stack-based Buffer Overflow Leading to Denial of Service in TP-Link Tapo C520WS

Vendor Tp-Link Systems Inc.
Product Tapo C520WS v2.6
Weakness CWE-121
Published April 2, 2026
Last update April 2, 2026

CVSS base score

7.1/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation. An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow. Successful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.

Key dates

02Disclosure timeline

April 2, 2026 CVE published
April 2, 2026 Record updated