CVE-2020-5523

Estado: ModificadaAlta (7.4)—

Android App 'MyPallete' and some of the Android banking applications based on 'MyPallete' do not verify X.509 certificates from servers, and also do not properly validate certificates with host-mismatch, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Puntuación base: 7.4

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 1.18%
Percentil entre todas las CVEs puntuadas: 67
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (9)

77bank — 77 Bank Ashikagabank — Ashigin Hokkaidobank — Dogin Hokugin — Hokuriku Bank Portal Naganobank — Nagagin Nttdata — Mypallete Shikokubank — Shikoku Bank Sihd-bk — Ikeda Senshu Bank Tohoku-bank — Tougin

CWE

CWE-295

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2020-5523",
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          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
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      "value": "Android App 'MyPallete' and some of the Android banking applications based on 'MyPallete' do not verify X.509 certificates from servers, and also do not properly validate certificates with host-mismatch, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate."
    },
    {
      "lang": "es",
      "value": "La aplicación de Android \"MyPallete\" y algunas de las aplicaciones bancarias de Android basadas en \"MyPallete\" no verifican los certificados X.509 de los servidores, y tampoco comprueban apropiadamente los certificados con incompatibilidad de host, lo que permite a atacantes de tipo man-in-the-middle falsificar servidores y obtener información confidencial por medio de un certificado diseñado."
    }
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  "lastModified": "2026-06-17T03:21:32.180",
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