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CISA: Microsoft SharePoint flaw now exploited in ransomware attacks
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Fusion42 · 23 August 2026 · Fusion42 review
The Cybersecurity and Infrastructure Security Agency (CISA) has reported that a vulnerability in Microsoft SharePoint is now being actively exploited by ransomware operators to compromise systems and demand ransom payments.
This Wire brief sits within Fusion42's coverage of Cybersecurity, and 1 source has reported it between 11 Aug 2026 and 18 Aug 2026.
◆ ◆ The Wire takeaway
Ransomware attackers using the SharePoint flaw have opened a fresh attack vector for cyber criminals that you must block immediately. This vulnerability turns SharePoint security into a frontline defence problem for your enterprise IT or security startup.
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1 source · first reported 11 Aug 2026 · latest 18 Aug 2026
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