Vulnerability 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.
Related Weaknesses (CWE)
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/
FAQ
What is CVE-2026-6239?
CVE-2026-6239 is a documented vulnerability. 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 processin...
How severe is CVE-2026-6239?
CVSS scoring is not yet available for CVE-2026-6239. Check NVD for updates.
Is there a patch for CVE-2026-6239?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.