PT-2026-47079 · Tp Link Systems · Tapo C520Ws V2

Published 2026-06-05 · Updated 2026-06-06 · CVE-2026-6242

NVD

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

An authenticated format string vulnerability exists in the ONVIF Subscribe service in Tapo C520WS v2 due to improper handling of externally supplied parameters within formatting functions. An attacker may inject crafted format strings into event subscription requests or notification generation path to disrupt normal service execution.

Successful exploitation may cause the event notification service to terminate unexpectedly, resulting in the loss of real-time alarm functionality and disruption of event notifications.

Fix

Use of Externally-Controlled Format String

Weakness Enumeration

CWE-134

Related Identifiers

CVE-2026-6242

Affected Products

Tapo C520Ws V2

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-6242 · 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