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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (52.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002
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)
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.