CVE Watch26 de out. de 2026

CVE-2026-42897

Microsoft Exchange Server Cross-Site Scripting Vulnerability

CVSS

8.1

Alta

EPSS

70.7%

p99

KEV

SIM

15 de mai. de 2026

Exploit Today

0-100

Publicado: 14 de mai. de 2026 · Última mod.: 26 de out. de 2026 · CWE-79

EPSS · 30d

0.5%EPSS · 30 dias70.7%

2026-10-082026-11-05

Ficha do catálogo KEV

Produto

Microsoft / Microsoft

Vulnerabilidade

Microsoft Exchange Server Cross-Site Scripting Vulnerability

Adicionado ao KEV

15 de mai. de 2026

Corrigir até

29 de mai. de 2026

Uso conhecido em ransomware

Não

Descrição 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.

Ação necessária

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

Descrição técnica

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Referências oficiais

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