CVE-2026-42897

Producto

Microsoft / Microsoft

Vulnerabilidad

Microsoft Exchange Server Cross-Site Scripting Vulnerability

Añadido a KEV

15 may 2026

Remediar antes de

29 may 2026

Uso conocido en ransomware

No

Descripción resumida

Microsoft Exchange Server contains a cross-site scripting vulnerability during web page generation in Outlook Web Access and when certain interaction conditions are met, arbitrary JavaScript can be executed in the browser context.

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/en-US/vulnerability/CVE-2026-42897 ; https://learn.microsoft.com/en-us/exchange/plan-and-deploy/post-installation-tasks/security-best-practices/exchange-emergency-mitigation-service ; https://nvd.nist.gov/vuln/detail/CVE-2026-42897