Microsoft Patch Tuesday: April 2026

Microsoft released its April 2026 Patch Tuesday update, addressing 165 newly disclosed vulnerabilities across its product ecosystem. Arctic Wolf highlights specific risks within this bulletin, notably CVE-2026-32201, a spoofing vulnerability affecting Microsoft SharePoint Server with a CVSS score of 6.5. This flaw allows unauthorized actors to perform network spoofing due to improper validation, potentially leading to unauthorized access or misinformation campaigns. While no specific threat groups are attributed to active exploitation in this report, the volume of patches indicates a significant attack surface reduction opportunity. Organizations should prioritize testing and deploying these updates to mitigate risks associated with server spoofing and other disclosed flaws. Immediate patching is recommended to prevent potential compromise of SharePoint environments and maintain security posture against emerging threats leveraging these vulnerabilities.

On April 14, 2026, Microsoft released its April 2026 security update, addressing 165 newly disclosed vulnerabilities. Among these, Arctic Wolf has highlighted two vulnerabilities in this security bulletin. Vulnerabilities Vulnerability CVSS Description Exploited? CVE-2026-32201 6.5 Microsoft SharePoint Server Spoofing Vulnerability – Allows an unauthorized threat actor to perform spoofing over a network due to improper ... Microsoft Patch Tuesday: April 2026

Microsoft released its April 2026 Patch Tuesday update, addressing 165 newly disclosed vulnerabilities across its product ecosystem. Arctic Wolf highlights specific risks within this bulletin, notably CVE-2026-32201, a spoofing vulnerability affecting Microsoft SharePoint Server with a CVSS score of 6.5. This flaw allows unauthorized actors to perform network spoofing due to improper validation, potentially leading to unauthorized access or misinformation campaigns. While no specific threat groups are attributed to active exploitation in this report, the volume of patches indicates a significant attack surface reduction opportunity. Organizations should prioritize testing and deploying these updates to mitigate risks associated with server spoofing and other disclosed flaws. Immediate patching is recommended to prevent potential compromise of SharePoint environments and maintain security posture against emerging threats leveraging these vulnerabilities. On April 14, 2026, Microsoft released its April 2026 security update, addressing 165 newly disclosed vulnerabilities. Among these, Arctic Wolf has highlighted two vulnerabilities in this security bulletin. Vulnerabilities Vulnerability CVSS Description Exploited? CVE-2026-32201 6.5 Microsoft SharePoint Server Spoofing Vulnerability – Allows an unauthorized threat actor to perform spoofing over a network due to improper ... Microsoft Patch Tuesday: April 2026 On April 14, 2026, Microsoft released its April 2026 security update, addressing 165 newly disclosed vulnerabilities. Among these, Arctic Wolf has highlighted two vulnerabilities in this security bulletin. Vulnerabilities Vulnerability CVSS Description Exploited? CVE-2026-32201 6.5 Microsoft SharePoint Server Spoofing Vulnerability – Allows an unauthorized threat actor to perform spoofing over a network due to improper ... Microsoft Patch Tuesday: April 2026