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CVE-2026-58277Important

Microsoft SharePoint Elevation of Privilege Vulnerability

MSRC advisory NVD CVE.org

Assessment

Improper authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Severity
Important
CVSS base score
8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Elevation of Privilege
EPSS, next 30 days
0.9%Higher than 59.4% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
Exploitability
Exploitation Less Likely
Publicly disclosed
No
Customer action
Required: apply the update
Component
Microsoft Office SharePoint
Weakness
CWE-285: Improper Authorization
Issued by
Microsoft
Published
14 Jul 2026 · July 2026
Last revised
14 Jul 2026

Updates that fix it

2 KBs
KBTypeRestartApplies toOther CVEs
KB5002883 Security Update — Microsoft SharePoint Server 2019 All CVEs in KB5002883
KB5002891 Security Update — Microsoft SharePoint Enterprise Server 2016 All CVEs in KB5002891

Affected products

Microsoft Office
2 affected products
  • Microsoft SharePoint Enterprise Server 2016
  • Microsoft SharePoint Server 2019
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