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CVE-2026-55040

exploited in the wild☆ pin

CVSS

9.1

Reports

6

First seen

Jul 14, 2026

Last seen

Jul 15, 2026

Affected product

Microsoft SharePoint Server

Recent reports

Critical vulnerabilities in Microsoft SharePoint Server – CVE-2026-56164, CVE-2026-55040, CVE-2026-58644

Canadian Centre AlertsJul 15, 2026 High

Microsoft releases record 622 patches in July; two SharePoint and AD flaws exploited in wild

The Record (Recorded Future News)Jul 15, 2026 High

Researcher Releases Windows Zero-Day PoC After Microsoft Patch Tuesday; SharePoint Flaws Actively Exploited

The Hacker NewsJul 15, 2026 Critical

CISA warns admins to patch actively exploited SharePoint flaws

Bleeping ComputerJul 15, 2026 High

Microsoft Patches Record 622 Flaws in July; Two Zero-Days Under Active Attack

The Hacker NewsJul 14, 2026 Critical

Microsoft July 2026 Patch Tuesday fixes 570 flaws, including 3 zero-days

Bleeping ComputerJul 14, 2026

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