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CVE-2026-55040: Microsoft SharePoint Weak Authentication Vulnerability · RaqibCTI
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CVE-2026-55040
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CVE
CVE-2026-55040
P2
Microsoft SharePoint Weak Authentication Vulnerability
Microsoft · SharePoint
Date added (CISA)
2026-08-18
Remediation due
2026-08-21
Known ransomware use
Not indicated
Remediation priority
P2 — past CISA due date
Associated with
Related to
←
Lazarus Group (TraderTraitor cluster) / APT38 / BlueNoroff · SPECTRE
campaign
Correlated cluster
2026-09-16
Overview
ATT&CK
Related
ATT&CK mapping
No ATT&CK mapping yet
The CTID Mappings Explorer hasn't published an exploitation/impact technique mapping for this CVE yet.
Source:
NVD ↗
·
CISA KEV Catalog ↗