Critical Unpatched SharePoint Zero-Day Actively Exploited, Breaches 75+ Global Organizations

A critical security vulnerability in Microsoft SharePoint Server has been weaponized as part of an “active, large-scale” exploitation campaign.
The zero-day flaw, tracked as CVE-2025-53770 (CVSS score: 9.8), has been described as a variant of CVE-2025-49706 (CVSS score: 6.3), a spoofing bug in Microsoft SharePoint Server that was addressed by the tech giant as part of its July 2025 Patch Tuesday