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CVE-2026-56164

CriticalCVSS 9.8/10Known exploited (CISA KEV)Last modified Jul 14, 2026

Description

Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	Microsoft SharePoint Enterprise Server 2016	>= 16.0.0, < 16.0.5561.1001
Microsoft	Microsoft SharePoint Server 2019	>= 16.0.0, < 16.0.10417.20175
Microsoft	Microsoft SharePoint Server Subscription Edition	>= 16.0.0, < 16.0.19725.20434

References

Timeline

Published: Jul 14, 2026
Last modified: Jul 14, 2026
Added to CISA KEV: Jul 14, 2026
NVD status: Analyzed

Related CVEs from 2026

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CVE-2026-56164: Critical severity, CVSS 9.8 | Vulnix