Microsoft SharePoint Remote Code Execution and JWT Bypass Vulnerabilities Advisory (CVE-2026-63520/CVE-2026-55040)

Based on the provided webpage screenshot, here is a summary of the key vulnerability information: Vulnerability Overview CVE ID: CVE-2026-63520 Vulnerability Type: Remote Code Execution (RCE) in Microsoft SharePoint Status: Patched Scope of Impact Affected Products: Microsoft SharePoint Vulnerability Description: This vulnerability allows attackers to execute remote code within Microsoft SharePoint, potentially leading to full system compromise. Remediation Patch Status: Patched Recommended Actions: Users should immediately update Microsoft SharePoint to the latest version to mitigate this vulnerability. Related Vulnerability CVE ID: CVE-2026-55040 Vulnerability Type: JWT Token Authentication Bypass in Microsoft SharePoint Status: Patched Scope of Impact Affected Products: Microsoft SharePoint Vulnerability Description: This vulnerability allows attackers to bypass Microsoft SharePoint's JWT token authentication, potentially resulting in unauthorized access. Remediation Patch Status: Patched Recommended Actions: Users should immediately update Microsoft SharePoint to the latest version to mitigate this vulnerability. Additional Information Release Date: August 12, 2026 Last Updated: August 12, 2026 Reading Time: 3 minutes Author Information Author: Stephen Fewer Role: Senior Vulnerability Researcher Related Articles Title: Sunsetting the Public AttackerKB Platform Author: Douglas McKee, Director, Vulnerability Intelligence Summary This page primarily details two Microsoft SharePoint vulnerabilities (CVE-2026-63520 and CVE-2026-55040), both of which have been patched. Users are advised to update their software as soon as possible to address these vulnerabilities.

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Microsoft SharePoint Remote Code Execution and JWT Bypass Vulnerabilities Advisory (CVE-2026-63520/CVE-2026-55040)

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