Microsoft SharePoint Weak Authentication Vulnerability

Microsoft SharePoint contains a weak authentication vulnerability which allows an unauthorized attacker to bypass a security feature over a network.

Published 26 Aug 2026Updated 26 Aug 202654 sources
CVSS 0.0 PoC CANDIDATE△ CISA KEV

What happened

Microsoft SharePoint contains a weak authentication vulnerability which allows an unauthorized attacker to bypass a security feature over a network.

Affected versions

SharePoint: See original advisory Fixed: See vendor advisory.

Why it matters

This source correlation may provide earlier visibility while structured CVE metadata is still being updated.

Detection & mitigation

  • Review the original advisory and validate affected versions.
  • Apply vendor-provided updates or mitigations when available.

Public PoC references