CVE-2026-6241 MEDIUM

CVE-2026-6241: Authenticated Format String Vulnerability in ONVIF AddScopes Method on TP-Link Tapo C520WS

Vendor Tp-Link Systems Inc.
Product Tapo C520WS v2
Weakness CWE-134
Published June 5, 2026
Last update June 8, 2026

CVSS base score

6.8/10
Attack vector Adjacent
Attack complexity Low
Privileges required High
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

An authenticated format string vulnerability is present in the ONVIF AddScopes in Tapo C520WS v2, where user-controlled input is improperly passed to formatting functions without adequate sanitization. An attacker can inject format specifiers into ONVIF scope parameters to manipulate memory handling behavior. Successful exploitation may cause the ONVIF management service to crash, resulting in DoS condition that impacts normal device operation.

Key dates

02Disclosure timeline

June 5, 2026 CVE published
June 8, 2026 Record updated