CVE-2026-6242

June 6, 2026, 12:16 a.m.

6.8
Medium

Description

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.

Product(s) Impacted

Vendor Product Versions
Tapo
  • Tapo C520ws
  • v2
Onvif
  • Onvif
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-134
Use of Externally-Controlled Format String
The product uses a function that accepts a format string as an argument, but the format string originates from an external source.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a tapo tapo_c520ws v2 / / / / / / /
a onvif onvif / / / / / / / /

References

https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes
https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes
https://www.tp-link.com/us/support/faq/5120/

Tags

CWE-134
f23511db-6c3e-4e32-a477-6aa17d310630
2026-06-06
CVE-2026-6242

CVSS Score

6.8 / 10

CVSS Data - 4.0

  • Attack Vector: ADJACENT
  • Attack Complexity: LOW
  • Attack Requirements: NONE
  • Privileges Required: HIGH
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: HIGH
  • Exploit Maturity: NOT_DEFINED

    • 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/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

    View Vector String

Timeline

Published: June 6, 2026, 12:16 a.m.
Last Modified: June 6, 2026, 12:16 a.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

f23511db-6c3e-4e32-a477-6aa17d310630

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.