Microsoft Issues Patches for SharePoint Zero-Day and 168 Other New Vulnerabilities

Microsoft on Tuesday released updates to address a record 169 security flaws across its product portfolio, including one vulnerability that has been actively exploited in the wild. Of these 169 vulnerabilities, 157 are rated Important, eight are rated Critical, three are rated Moderate, and one i...

Patch Tuesday, April 2026 Edition

Microsoft today pushed software updates to fix a staggering 167 security vulnerabilities in its Windows operating systems and related software, including a SharePoint Server zero-day and a publicly disclosed weakness in Windows Defender dubbed "BlueHammer." Separately, Google Chrome fixed its...

Hackers Exploit SharePoint Zero-Day Since July 7 to Steal Keys, Maintain Persistent Access

The recently disclosed critical Microsoft SharePoint vulnerability has been under exploitation as early as July 7, 2025, according to findings from Check Point Research. The cybersecurity company said it observed first exploitation attempts targeting an unnamed major Western government, with the...

CVE-2025-53770 - Zero-day exploitation in the wild of Microsoft SharePoint servers

Overview On Saturday July 19, 2025, Microsoft released an advisory for CVE-2025-53770, a critical Remote Code Execution RCE vulnerability affecting on-premise SharePoint servers. This vulnerability has been exploited in the wild as a zero-day by an unknown threat actor prior to the disclosure fro...

Critical Unpatched SharePoint Zero-Day Actively Exploited, Breaches 75+ Company Servers

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-2025-49704 CVSS score: 8.8, a code injection and...