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Review reviewHigh

CVE-2026-48571

Microsoft Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2

Use after free in Windows App Installer allows an authorized attacker to elevate privileges locally.

CVSS
7
EPSS
0.21%
11.8% percentile
CISA KEV
Not listed
Published
2026.07.15
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.21%
Technical severityCVSS 7

Vulnerability overview

Use after free in Windows App Installer allows an authorized attacker to elevate privileges locally.

Affected product and versions

Product
Microsoft Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2
Affected versions
>= 10.0.22631.0 < 10.0.22631.7376, >= 10.0.26100.0 < 10.0.26100.8875, >= 10.0.26200.0 < 10.0.26200.8875, >= 10.0.28000.0 < 10.0.28000.2525, >= 10.0.26100.0 < 10.0.26100.33158, < 10.0.22631.7376, < 10.0.26100.8875, < 10.0.26200.8875, < 10.0.28000.2269, < 10.0.26100.33158
Fixed versions
10.0.22631.7376, 10.0.26100.8875, 10.0.26200.8875, 10.0.28000.2269, 10.0.26100.33158

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Microsoft Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416
CVE-2026-48571 — Microsoft Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2 | SECUFOCUS NOW