CVE-2026-19293

Estado: Pendiente de análisisAlta (8.8)—

SMP security request (from peripheral) does not include the maximum encryption key size supported. Using a key with less than the maximum keysize makes brute-forcing the key easier. See V6 in BLERP paper linked below.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 8.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.20%
Percentil entre todas las CVEs puntuadas: 9
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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement85 %
Impacto principalT1040 Network Sniffingcredential access · discovery65 %
Impacto secundarioT1555 Credentials from Password Storescredential access60 %

AV:A (red adyacente) sin privilegios previos → T1210. Vulnerabilidad en negociación de cifrado SMP permite fuerza bruta contra clave débil, comprometiendo confidencialidad e integridad. Acceso a credenciales/claves (T1555) o intercepción de datos (T1040) en Bluetooth.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account Management Network Segmentation Update Software Vulnerability Scanning User Account Management Threat Intelligence Program

CWE

CWE-521

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-19293",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-19293",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-13T17:04:23.200962Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "product-security@silabs.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "product-security@silabs.com",
      "affectedData": [
        {
          "vendor": "silabs.com",
          "product": "WiseConnect",
          "versions": [
            {
              "status": "affected",
              "version": "4.0.0",
              "lessThan": "4.1.0",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "2.0.0",
              "lessThan": "2.14.0",
              "versionType": "semver"
            }
          ],
          "packageName": "SiSDK",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-08-13T15:19:37.873",
  "references": [
    {
      "url": "https://community.silabs.com/068Vm00000x0yyH",
      "source": "product-security@silabs.com"
    },
    {
      "url": "https://docs.silabs.com/rs9116-wiseconnect/latest/wifibt-wc-release-notes/rs9116-ble-release-notes#bug-fixes",
      "source": "product-security@silabs.com"
    },
    {
      "url": "https://docs.silabs.com/sisdk-release-notes/latest/sisdk-wifi-release-notes/sisdk-wifible-ble-release-notes",
      "source": "product-security@silabs.com"
    },
    {
      "url": "https://www.ndss-symposium.org/ndss-paper/blerp-ble-re-pairing-attacks-and-defenses/",
      "source": "product-security@silabs.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "product-security@silabs.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-521"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "SMP security request (from peripheral) does not include the maximum\nencryption key size supported. Using a key with less than the maximum keysize\nmakes brute-forcing the key easier. See V6 in BLERP paper linked below."
    }
  ],
  "lastModified": "2026-09-08T19:12:59.557",
  "sourceIdentifier": "product-security@silabs.com"
}