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CISA warns of active exploitation of critical Microsoft SharePoint vulnerability CVE-2026-20963

The US Cybersecurity and Infrastructure Security Agency (CISA) has confirmed active exploitation of a critical remote code execution vulnerability in Microsoft SharePoint, tracked as CVE-2026-20963.

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  • SecurityWeek report on CISA warning of SharePoint vulnerability exploitation
    securityweek.com
  • Updated CISA exploited flaws list adds SharePoint, Zimbra bugs
    SC Media
  • Unknown attackers exploit yet another critical SharePoint bug
    theregister_security
  • CISA warns of active exploitation of Microsoft SharePoint vulnerability (CVE-2026-20963)
    Help Net Security
  • Critical Microsoft SharePoint flaw now exploited in attacks
    bleepingcomputer_all