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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 · SPECTREcampaignCorrelated cluster2026-09-16

Related

Nothing linked yet

No threat actor or pipeline report has been cross-referenced against this CVE yet. The associated-with rail above shows any asserted relationships.

Source: NVD ↗ · CISA KEV Catalog ↗

CVE-2026-55040: Microsoft SharePoint Weak Authentication Vulnerability · RaqibCTI