CVE-2026-80098

Estado: AnalizadaCrítica (10)—

Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Puntuación base: 10

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.49%
Percentil entre todas las CVEs puntuadas: 40
Fecha de la puntuación: 1/10/2026

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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access95 %
Impacto principalT1068 Exploitation for Privilege Escalationprivilege escalation90 %

AV:N/PR:N permite T1190 (aplicación expuesta en red). CWE-347 (verificación criptográfica impropia) facilita suplantación y escalada a privilegios de administrador (impacto T1068); T1553.006 por manipulación de confianza de código/certificados.

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

Application Isolation and Sandboxing Exploit Protection Update Software Vulnerability Scanning Threat Intelligence Program Privileged Account Management

Tecnologías afectadas (1)

Microsoft — Copilot Studio

CWE

CWE-347

Referencias

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80098

JSON original (NVD)

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      ],
      "sourceIdentifier": "secure@microsoft.com"
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          "options": [
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          ],
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          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 4.7,
        "exploitabilityScore": 3.9
      },
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        "source": "nvd@nist.gov",
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          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
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      }
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  },
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          "versions": [
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  "published": "2026-09-03T23:17:20.350",
  "references": [
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      "tags": [
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      ],
      "source": "secure@microsoft.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "secure@microsoft.com",
      "description": [
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          "value": "CWE-347"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network."
    }
  ],
  "lastModified": "2026-09-08T17:53:07.297",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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}