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CVE-2023-29357

CRITICAL9.8
CISA KEV

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

CWE-303

CISA Known-Exploited Vulnerability

Product: Microsoft — SharePoint Server

Name: Microsoft SharePoint Server Privilege Escalation Vulnerability

Date added: 2024-01-10 · Due: 2024-01-31

USED IN RANSOMWARE

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

View on NVD