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CVE-2026-42896

Windows DWM Core Library Elevation of Privilege Vulnerability

HIGH
7.8
CVSS Score
Published: May 12, 2026 at 04:59 PM UTC
Updated: June 17, 2026 at 10:48 AM UTC
4 products affected across 1 vendorWindows Server 2025Windows 11 24H2Windows 11 25H2

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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Windows 11 24H2· Microsoft
95%
v < 10.0.26100.845710.0.26100.0 ≤ v < 10.0.26100.845710.0.26100.0
Affected range stops below 10.0.26100.8457, so it looks safe — our inference, not a vendor statement
Windows 11 25H2· Microsoft
95%
v < 10.0.26200.845710.0.26200.0 ≤ v < 10.0.26200.845710.0.26200.0
Affected range stops below 10.0.26200.8457, so it looks safe — our inference, not a vendor statement
Windows 11 26H1· Microsoft
95%
v < 10.0.28000.211310.0.28000.0 ≤ v < 10.0.28000.211310.0.28000.0
Affected range stops below 10.0.28000.2113, so it looks safe — our inference, not a vendor statement
Windows Server 2025· Microsoft
95%
v < 10.0.26100.3286010.0.26100.0 ≤ v < 10.0.26100.3286010.0.26100.0
Affected range stops below 10.0.26100.32860, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42896

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-122CWE-190

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