A critical zero-day vulnerability, designated as CVE-2025-53770, has been identified in Microsoft SharePoint Server, posing significant risks to organizations worldwide. This flaw allows unauthenticated attackers to execute arbitrary code remotely, potentially leading to full system compromise. The vulnerability affects on-premises versions of SharePoint Server 2016, 2019, and the Subscription Edition, while SharePoint Online in Microsoft 365 remains unaffected. The exploit, known as...