Windows Installer Information Disclosure Vulnerability

Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely CVE-2026-112789 · score 4.7/10

What could go wrong?

Private information could leak to someone who should not see it.

How urgent is it?

Check Microsoft’s page for details.

Who is affected?

Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows Server 2025, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 10 Version 1607 for 32-bit Systems and 20 more versions

What should I do?

Install this month’s updates via Windows Update, Intune or your update tool, then restart.

Known problems

Microsoft lists known issues per update: KB5131087, KB5132061, KB5132043, KB5131080, KB5131077, KB5132059. Official page.