CVE-2026-26135

Estado: AnalizadaAlta (8.8)—

Server-side request forgery (ssrf) in Azure Custom Locations Resource Provider (RP) allows an authorized attacker to elevate privileges over a network.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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: 0.75%
Percentil entre todas las CVEs puntuadas: 53
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 movement90 %
Impacto principalT1090 Proxycommand and control85 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation80 %

AV:N/PR:L indica acceso remoto con privilegios mínimos (T1210). SSRF (CWE-918) permite proxy/SSRF (T1090). Acceso autorizado + escalada de privilegios confirma T1068 como impacto secundario.

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

Threat Intelligence Program Application Isolation and Sandboxing Exploit Protection Update Software Vulnerability Scanning SSL/TLS Inspection

Tecnologías afectadas (1)

Microsoft — Azure Custom Locations Resource Provider

CWE

CWE-918

Referencias

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26135

JSON original (NVD)

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      ],
      "sourceIdentifier": "secure@microsoft.com"
    }
  ],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "options": [
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            }
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          "version": "2.0.3",
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          "privilegesRequired": "LOW",
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        "exploitabilityScore": 3.1
      },
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        "source": "nvd@nist.gov",
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          "confidentialityImpact": "HIGH"
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        "exploitabilityScore": 2.8
      }
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  "affected": [
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      "affectedData": [
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          "product": "Azure Custom Locations Resource Provider",
          "versions": [
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              "status": "affected",
              "version": "-"
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  ],
  "published": "2026-04-03T00:16:04.353",
  "references": [
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      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26135",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secure@microsoft.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Server-side request forgery (ssrf) in Azure Custom Locations Resource Provider (RP) allows an authorized attacker to elevate privileges over a network."
    },
    {
      "lang": "es",
      "value": "Falsificación de petición del lado del servidor (SSRF) en el proveedor de recursos (RP) de ubicaciones personalizadas de Azure permite a un atacante autorizado elevar privilegios sobre una red."
    }
  ],
  "lastModified": "2026-07-24T21:10:00.143",
  "configurations": [
    {
      "nodes": [
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          "negate": false,
          "cpeMatch": [
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          "operator": "OR"
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  "sourceIdentifier": "secure@microsoft.com"
}