critical CISA KEV Ransomware

CVE-2023-29357

Microsoft SharePoint Server Privilege Escalation Vulnerability

// Description

Microsoft SharePoint Server contains an unspecified vulnerability that allows an unauthenticated attacker, who has gained access to spoofed JWT authentication tokens, to use them for executing a network attack. This attack bypasses authentication, enabling the attacker to gain administrator privileges.

// Required action

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

Federal remediation due Jan 31, 2024 — past due

// Coverage

CVE-2023-29357: CISA Warns of Active SharePoint Exploit Chain
Jul 15, 2026