CVE-2025-59245 CRITICAL

CVE-2025-59245: Microsoft SharePoint Online Elevation of Privilege Vulnerability

Vendor Microsoft
Product Microsoft SharePoint Online
Weakness CWE-502 · Unsafe deserialization
Published November 20, 2025
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

What the vulnerability does

01Description

Microsoft SharePoint Online Elevation of Privilege Vulnerability

Key dates

02Disclosure timeline

November 20, 2025 CVE published
February 26, 2026 Record updated