A high-severity bug in Microsoft SharePoint that’s been exploited since early July has been abused by ransomware, according to an Aug. 10 update to the Cybersecurity and Infrastructure Security Agency’s Known Exploited Vulnerabilities (KEV) catalog.CISA offered no more information on the nature of the ransomware attack, but the CVSS 8.8 flaw — CVE-2026-45659 — was…