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CVE-2026-45604

Windows Managed Installer Information Disclosure Vulnerability

MEDIUM
5.5
CVSS Score
Published: June 9, 2026 at 05:05 PM UTC
Updated: July 23, 2026 at 07:32 PM UTC
5 products affected across 1 vendorWindows Server 2025Windows 11 24H2Windows 11 23H2

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Out-of-bounds read in Windows Application Identity (AppID) Subsystem allows an authorized attacker to disclose information locally.

Affected

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

Windows 11 23H2· Microsoft
95%
v < 10.0.22631.721910.0.22631.0 ≤ v < 10.0.22631.721910.0.22631.0
Affected range stops below 10.0.22631.7219, so it looks safe — our inference, not a vendor statement
Windows 11 24H2· Microsoft
95%
v < 10.0.26100.865510.0.26100.0 ≤ v < 10.0.26100.865510.0.26100.0
Affected range stops below 10.0.26100.8655, so it looks safe — our inference, not a vendor statement
Windows 11 25H2· Microsoft
95%
v < 10.0.26200.865510.0.26200.0 ≤ v < 10.0.26200.865510.0.26200.0
Affected range stops below 10.0.26200.8655, so it looks safe — our inference, not a vendor statement
Windows 11 26H1· Microsoft
95%
v < 10.0.28000.226910.0.28000.0 ≤ v < 10.0.28000.226910.0.28000.0
Affected range stops below 10.0.28000.2269, so it looks safe — our inference, not a vendor statement
Windows Server 2025· Microsoft
95%
v < 10.0.26100.3299510.0.26100.0 ≤ v < 10.0.26100.3299510.0.26100.0
Affected range stops below 10.0.26100.32995, 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: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45604

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

5.5MEDIUMmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-125

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