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CVE-2023-21529

Estado: AnalizadaAlta (8.8)⚠ Explotación activa

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS

Probabilidad de explotación (EPSS)

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).

CISA KEV — explotada activamente

🎯 Técnicas ATT&CK

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

AV:N con PR:L permite explotación de servicio remoto (T1210). CWE-502 (deserialización insegura) en Exchange habilita RCE (T1059). Acceso a credenciales/cuentas (T1078) probable por control del servidor. Uso activo en ransomware confirma impacto destructivo.

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 ManagementDisable or Remove Feature or ProgramApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser Training

Tecnologías afectadas (1)

Microsoft — Exchange Server

CWE

Referencias

JSON original (NVD)

Mostrar
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        "ssvcData": {
          "id": "CVE-2023-21529",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
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          ],
          "version": "2.0.3",
          "timestamp": "2023-02-15T00:00:00+00:00"
        }
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      "tags": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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  "descriptions": [
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      "value": "Microsoft Exchange Server Remote Code Execution Vulnerability"
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  "lastModified": "2026-08-19T17:18:05.870",
  "cisaActionDue": "2026-04-27",
  "cisaExploitAdd": "2026-04-13",
  "configurations": [
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  "sourceIdentifier": "secure@microsoft.com",
  "cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
  "cisaVulnerabilityName": "Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability"
}