VulnerabilityBleeping Computer
9.5 — CRITICAL
Microsoft releases Windows 10 KB5122878 extended security update
Microsoft has released the Windows 10 KB5122878 extended security update, which includes this month's record-breaking September 2026 Patch Tuesday fixes, along with a few bug fixes. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
Microsoft released a Windows 10 extended security update (KB5122878) addressing 966 vulnerabilities, including two zero-day flaws, as part of the September 2026 Patch Tuesday fixes.
⚙️Technical Details
Affected Systems
Windows 10 Enterprise LTSC or enrolled in the ESU program
Attack Vectors
Remote Desktop audio redirectionDevices with an unrecommended BitLocker Group Policy configuration
💥Impact Assessment
Severity: critical
Who Is at Risk
Users running Windows 10 Enterprise LTSC or enrolled in the ESU program
🛡️Recommended Actions
1Apply the KB5122878 update to affected systems as soon as possible
2Verify and configure Remote Desktop audio redirection settings
3Review and update BitLocker Group Policy configurations
📦Affected Products
Windows 10
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