CVE-2026-45604 — Windows Managed Installer Information Disclosure Vulnerability

Executive Summary

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

Overview

5.5

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Information Disclosure

Weakness CWE-125: Out-of-bounds Read

Released Jun 9 2026

Last Updated Jun 9 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00274 — 0.18953 percentile

NVD CVSS 5.5 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

ATTACK VECTOR

Local

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

Low

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

None

AVAILABILITY

None

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 4.8

EPSS Score

0.00274

probability of exploitation in the next 30 days

0.18953 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

10 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 11 Version 23H2 for ARM64-based Systems	`5093998 (Security Update)`	Important	Information Disclosure	Yes
Windows 11 Version 23H2 for x64-based Systems	`5093998 (Security Update)`	Important	Information Disclosure	Yes
Windows 11 Version 24H2 for ARM64-based Systems	`5094126 (Security Update)`	Important	Information Disclosure	Yes
Windows 11 Version 24H2 for x64-based Systems	`5094126 (Security Update)`	Important	Information Disclosure	Yes
Windows 11 Version 25H2 for ARM64-based Systems	`5094126 (Security Update)`	Important	Information Disclosure	Yes
Windows 11 Version 25H2 for x64-based Systems	`5094126 (Security Update)`	Important	Information Disclosure	Yes
Windows 11 Version 26H1 for ARM64-based Systems	`5095051 (Security Update)`	Important	Information Disclosure	Yes
Windows 11 version 26H1 for x64-based Systems	`5095051 (Security Update)`	Important	Information Disclosure	Yes
Windows Server 2025	`5094125 (Security Update)`	Important	Information Disclosure	Yes
Windows Server 2025 (Server Core installation)	`5094125 (Security Update)`	Important	Information Disclosure	Yes

Patches

4 patches

Article	Type	Restart
`5093998`	Security Update	Yes
`5094126`	Security Update	Yes
`5095051`	Security Update	Yes
`5094125`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Souhail Hammou

References

MSRC Advisory MITRE NVD