CVE-2026-45637: Microsoft DWM Core Library Elevation of Privilege Vulnerability

highCVSS 7.8CVE-2026-45637

Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoft product: DWM Core Library Privilege escalation

What: Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
Who is affected: Authorized users of the DWM Core Library.
Urgency: Remediation is urgent due to the high severity and potential for privilege escalation.
Action: Apply the latest security updates for Windows.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.8
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45637

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-456370.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-45637	coverage & exploitation status	NVD · CVE.org

Recent advisories for Microsoft DWM Core

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalexploitedCVE-2025-30400: Microsoft Windows DWM Core Library Use-After-Free Vulnerabilitycisa-kev · 2025-05-13
criticalexploitedCVE-2024-30051: Microsoft DWM Core Library Privilege Escalation Vulnerabilitycisa-kev · 2024-05-14
criticalexploitedCVE-2023-36033: Microsoft Windows Desktop Window Manager (DWM) Core Library Privilege Escalation Vulnerabilitycisa-kev · 2023-11-14
criticalexploitedCVE-2021-33739: Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation Vulnerabilitycisa-kev · 2021-11-03