CVE Watch—

CVE-2023-21529

Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability

CVSS

—

Sin CVSS

EPSS

62.1%

p99

KEV

SÍ

13 abr 2026

Exploit Today

0-100

Publicado: — · Última mod.: —

EPSS · 30d

62.1%EPSS · 30 días62.1%

2026-06-302026-07-16

Ficha del catálogo KEV

Producto

Microsoft / Exchange Server

Vulnerabilidad

Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability

Añadido a KEV

13 abr 2026

Remediar antes de

27 abr 2026

Uso conocido en ransomware

Sí

Descripción resumida

Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.

Acción requerida

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notas

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529 ; https://nvd.nist.gov/vuln/detail/CVE-2023-21529

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