Title: Tapo C520WS de TP-Link Systems Inc., Description: Una vulnerabilidad de desbordamiento de búfer basado en montículo fue identificada en TP-Link Tapo C520WS v2.6 dentro del análisis asíncrono del contenido de flujo de video local debido a una alineación y validación insuficientes de los límites del búfer al procesar entradas de transmisión. Un atacante en el mismo segmento de red podría desencadenar condiciones de corrupción de memoria del montículo al enviar cargas útiles manipuladas que causan operaciones de escritura más allá de los límites del búfer asignado. La explotación exitosa causa una condición de Denegación de Servicio (DoS), haciendo que el proceso del dispositivo falle o deje de responder.

{"timestamp":"2026-04-02T17:58:02.775894Z","id":"CVE-2026-34120","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"TP-Link Systems Inc.","product":"Tapo C520WS v2.6","defaultStatus":"unaffected","modules":["Asynchronous parsing"],"versions":[{"version":"0","lessThan":"1.2.4 Build 260326 Rel.24666n","versionType":"custom","status":"affected"}]}]

AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AND
     OR
          *cpe:2.3:o:tp-link:tapo_c520ws_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.2.4
     OR
          cpe:2.3:h:tp-link:tapo_c520ws:2.6:*:*:*:*:*:*:*

TPLink: https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes Types: Release Notes

TPLink: https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes Types: Release Notes

TPLink: https://www.tp-link.com/us/support/faq/5047/ Types: Vendor Advisory

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the asynchronous parsing of local video stream content due to
insufficient alignment and validation of buffer boundaries when processing streaming inputs.An attacker
on the same network segment could trigger heap memory corruption conditions by
sending crafted payloads that cause write operations beyond allocated buffer
boundaries.  Successful exploitation
causes a Denial-of-Service (DoS) condition, causing the device’s process to
crash or become unresponsive.

AV:A/AC:L/AT:N/PR:N/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

CWE-122

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/5047/