As cited
Copy frozen at (site build).
vulnerabilities
Attackers exploit critical SharePoint flaw after PoC goes public (CVE-2026-55040)
A critical authentication bypass vulnerability in Microsoft SharePoint (CVE-2026-55040) has entered active exploitation after Rapid7 released proof-of-concept code. The flaw, patched in July 2026 Patch Tuesday updates, permits attackers to impersonate users, disclose files, and modify data without affecting system availability.
Why it matters: Organizations running unpatched SharePoint installations are immediately at risk of unauthorized file access and data modification by attackers leveraging now-public exploit code; apply July 2026 patches urgently.
- Source published
- First seen by Cybersecurity Tracker
Source attribution
Correction
Correction recorded as of .
vulnerabilities
Attackers exploit critical SharePoint flaw after PoC goes public (CVE-2026-55040)
A critical authentication bypass vulnerability in Microsoft SharePoint (CVE-2026-55040) has entered active exploitation after Rapid7 released proof-of-concept code. The flaw, patched in July 2026 Patch Tuesday updates, permits attackers to impersonate users, disclose files, and modify data without affecting system availability.
Why it matters: Organizations running unpatched SharePoint installations are immediately at risk of unauthorized file access and data modification by attackers leveraging now-public exploit code; apply July 2026 patches urgently.
- Source published
- First seen by Cybersecurity Tracker