CVE-2026-6239

MEDIUM EPSS 7.8%
Published Jun 6, 20263w ago · Modified Jun 17, 20261w ago
6.8 CVSS 4.0
Medium
Find Similar
Published Jun 6, 2026 3w ago
Last Modified Jun 17, 2026 1w ago

Description

A stack‑based buffer overflow vulnerability exists in Tapo C520WS v2 in the ONVIF CreateUsers service, where the device fails to properly validate the number of XML user nodes during request processing. An authenticated attacker can send a specially crafted ONVIF request containing an excessive number of user entries to trigger memory corruption. Successful exploitation may cause the ONVIF management service to terminate unexpectedly, resulting in a denial‑of‑service (DoS) condition that disrupts device configuration and management functions.

CVSS Details

Base Score
6.8
Exploitability
—
Impact
—
Vector string
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
Attack Vector Adjacent
Attack Complexity Low
Privileges Required High
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
7.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-121

References 3

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.