CVE Watch17 de jul. de 2026

CVE-2026-58644

Microsoft SharePoint Deserialization of Untrusted Data Vulnerability

CVSS

9.8

Crítica

EPSS

15.9%

p97

KEV

SIM

16 de jul. de 2026

Exploit Today

0-100

Publicado: 14 de jul. de 2026 · Última mod.: 17 de jul. de 2026 · CWE-502

EPSS · 30d

15.9%EPSS · 30 dias15.9%

2026-10-082026-11-05

Ficha do catálogo KEV

Produto

Microsoft / SharePoint

Vulnerabilidade

Microsoft SharePoint Deserialization of Untrusted Data Vulnerability

Adicionado ao KEV

16 de jul. de 2026

Corrigir até

19 de jul. de 2026

Uso conhecido em ransomware

Não

Descrição resumida

Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.

Ação necessária

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Notas

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58644 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-58644

Descrição técnica

Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

Referências oficiais

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