PT-2026-47077 · Tp Link Systems · Tapo C520Ws V2

Published 2026-06-05 · Updated 2026-06-06 · CVE-2026-6240

Mitre

CVSS v4.0

6.8

Medium

Base vector

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

A stack-based buffer overflow vulnerability exists in Tapo C520WS v2 in the ONVIF DeleteUsers service, due to insufficient boundary checks when handling multiple user deletion parameters. An authenticated attacker can send a crafted malicious request containing an excessive number of identifiers to overflow stack memory.

Successful exploitation may result in a service crash or deadlock, leading to DoS affecting device management and monitoring functionality.

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2026-6240

Affected Products

Tapo C520Ws V2

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-6240 · Security Note
• https://tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes · Patch
• https://tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes · Patch
• https://tp-link.com/us/support/faq/5120 · Vendor Advisory