Protect against SharePoint CVE-2025-53770 with Azure Web Application Firewall (WAF)

Summary Microsoft recently disclosed CVE-2025-53770, a critical vulnerability affecting on-premises SharePoint Server versions 2016, 2019, 2010, 2013, and Subscription Edition (SE). The vulnerability allows unauthenticated remote code execution (RCE) by chaining two separate CVEs: CVE-2025-49706 – Authentication Bypass CVE-2025-49704 – Deserialization Vulnerability Microsoft has released security updates for SharePoint Server…

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