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SharePoint Server Subscription Edition Affected by Critical Flaws

August 11, 2026

SharePoint Server Subscription Edition is affected by CVE-2026-55040 and CVE-2026-63520. The July update (KB5002882) breaks the exploit chain.

Discovered from: AI-Assisted SharePoint Exploit Chain Achieves Unauthenticated RCE: CVE-2026-55040 and CVE-2026-63520