CISA Confirms Active Exploitation of Critical SharePoint Deserialization Flaw
CISA has added CVE-2026-58644, a critical unauthenticated remote code execution flaw in Microsoft SharePoint, to its Known Exploited Vulnerabilities catalog after confirming real-world attacks. Federal agencies must remediate under BOD 26-04, and organizations running internet-facing SharePoint servers are urged to patch immediately.
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