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CVE Watch19 ago 2026

CVE-2021-42321

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS

8.8

Alto

EPSS

91.7%

p100

KEV

SÍ

17 nov 2021

Exploit Today

80

0-100

Publicado: 10 nov 2021 · Última mod.: 19 ago 2026

EPSS · 30d
90.4%EPSS · 30 días91.7%
2026-08-022026-08-30
Ficha del catálogo KEV

Producto

Microsoft / Exchange

Vulnerabilidad

Microsoft Exchange Server Remote Code Execution Vulnerability

Añadido a KEV

17 nov 2021

Remediar antes de

1 dic 2021

Uso conocido en ransomware

Sí

Descripción resumida

An authenticated attacker could leverage improper validation in cmdlet arguments within Microsoft Exchange and perform remote code execution.

Acción requerida

Apply updates per vendor instructions.

Notas

https://nvd.nist.gov/vuln/detail/CVE-2021-42321

Descripción técnica

Microsoft Exchange Server Remote Code Execution Vulnerability

Referencias oficiales
CVEs relacionados

Sin CVEs relacionados por CWE o producto.