CVE-2023-29357
Published 2023-06-14 · Updated 2026-06-17 · Source secure@microsoft.com
Summary
CVE-2023-29357 is a critical-severity (CVSS 9.8) vulnerability in Microsoft SharePoint Server. CISA added it to the Known Exploited Vulnerabilities catalog on January 10, 2024, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by January 31, 2024. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.
All 390 known-exploited Microsoft vulnerabilities →Description
Microsoft SharePoint Server Elevation of Privilege Vulnerability
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Microsoft — SharePoint Server
Name: Microsoft SharePoint Server Privilege Escalation Vulnerability
Date added: 2024-01-10 · Due: 2024-01-31
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.