Windows Layer-2 Bridge Network Driver Denial of Service Vulnerability

Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Unlikely CVE-2026-108402 · score 5.3/10

What could go wrong?

An attacker could make a program or service crash or stop responding.

How urgent is it?

Check Microsoft’s page for details.

Who is affected?

Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems and 16 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: KB5131085, KB5131096, KB5131090, KB5131087, KB5132061, KB5132043. Official page.