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CVE-2026-34118

Full vulnerability record from the local CVENow database.

Description

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C210 v3.6 and C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally supplied HTTP input.   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.

Severity
HIGH
CVSS score
7.1 (v4.0)
Vulnerability status
Modified
Source identifier
f23511db-6c3e-4e32-a477-6aa17d310630
Published
2026-04-02 18:16:28.503000
Last modified
2026-10-19 22:17:10.640000
View original CVE JSON 
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  "id": "CVE-2026-34118",
  "sourceIdentifier": "f23511db-6c3e-4e32-a477-6aa17d310630",
  "published": "2026-04-02T18:16:28.503",
  "lastModified": "2026-10-19T22:17:10.640",
  "vulnStatus": "Modified",
  "cveTags": [],
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      "value": "A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C210 v3.6 and C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally supplied HTTP input.  \n\nAn attacker\non the same network segment could trigger heap memory corruption conditions by\nsending crafted payloads that cause write operations beyond allocated buffer\nboundaries.  Successful exploitation\ncauses a Denial-of-Service (DoS) condition, causing the device’s process to\ncrash or become unresponsive."
    },
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      "lang": "es",
      "value": "Una vulnerabilidad de desbordamiento de búfer basado en montículo fue identificada en TP-Link Tapo C520WS v2.6 en la lógica de análisis del cuerpo HTTP POST debido a la falta de validación de la capacidad restante del búfer después de la asignación dinámica, debido a una validación de límites insuficiente al manejar entrada HTTP suministrada externamente. 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 se bloquee o deje de responder."
    }
  ],
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      "affectedData": [
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