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CVE

CVE-2026-45659

P1⬤ KNOWN RANSOMWARE USE

Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability

Microsoft · SharePoint Server

Date added (CISA)

2026-07-01

Remediation due

2026-07-04

Known ransomware use

Yes

Remediation priority

P1 — known ransomware use · past CISA due date

Associated with

Related to

Lazarus Group (TraderTraitor cluster) / APT38 / BlueNoroff · SPECTREcampaignCorrelated cluster2026-09-16
DysphoriacampaignCorrelated cluster2026-08-24

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 ↗