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About Authentication Bypass - Microsoft SharePoint (CVE-2026-55040) vulnerability

avleonov.com · published 13 September 2026

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Link
Host
CVE-2026-63520: Microsoft SharePoint Remote Code Execution (FIXED) Read at the source ↗
rapid7.com
https://www.rapid7.com/blog/post/ve-cve-2026-55040-microsoft-sharepoint-jwt-token-authentication-bypass-fixed/
rapid7.com
Rapid7 Analysis: Microsoft SharePoint JWT Token Authentication Bypass (CVE-2026-55040) Read at the source ↗
rapid7.com
Exploiting SharePoint: CVE-2026-55040 and CVE-2026-63520 RCE Chain Read at the source ↗
vulncheck.com
https://www.cisa.gov/news-events/alerts/2026/08/18/cisa-adds-four-known-exploited-vulnerabilities-catalog
cisa.gov
https://censys.com/advisory/cve-2026-55040-cve-2026-63520/
censys.com
https://dashboard.shadowserver.org/statistics/iot-devices/time-series/?date_range=other_range&d1=2026-09-01&d2=2026-09-13&vendor=microsoft&model=sharepoint&dataset=count&limit=1000&group_by=geo&stacking=stacked
dashboard.shadowserver.org
Elsewhere on avleonov.com (2)