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CVE-2026-45657

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CVSS

9.8

Reports

4

First seen

Jun 9, 2026

Last seen

Jun 15, 2026

Affected product

Windows Kernel

Associated actors

Nightmare Eclipse ×1 Outsider ×1 Qilin ×1 Russia-linked groups ×1 ShinyHunters ×1

Recent reports

Check Point Threat Intelligence Report – 15 June 2026

Check Point ResearchJun 15, 2026 Critical

Microsoft ships largest Patch Tuesday on record with one vulnerability under active attack

The Record (Recorded Future News)Jun 10, 2026 Critical

Microsoft Patches Record 206 Vulnerabilities Including Three Zero-Days and Critical RCE Bugs

The Hacker NewsJun 10, 2026 Critical

Microsoft Patch Tuesday June 2026 – 206 vulnerabilities including 32 critical RCE flaws

Cisco TalosJun 9, 2026

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