What is CVE-2026-63512?

CVE-2026-63512 is a medium-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-08-11.

How severe is CVE-2026-63512?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Microsoft Sharepoint Enterprise Server 2016

CVE-2026-63512

Incorrect authorization in Microsoft Office SharePoint allows an authorized attacker to perform tampering over a network.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Microsoft Sharepoint Enterprise Server 2016 — versions 16.0.0
Microsoft Sharepoint Server 2019 — versions 16.0.0
Microsoft Sharepoint Server Subscription Edition — versions 16.0.0
Microsoft Sharepoint_server — versions 2016, 2019

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

Microsoft SharePoint Server Tampering Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-63512?: CVE-2026-63512 is a medium-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-08-11.
How severe is CVE-2026-63512?: Medium severity. CVSS v3 base score is 6.5 out of 10.