OS SecurityBleeping Computer
8.5 — CRITICAL
Microsoft fixes Windows Server 2016 security update failures
Microsoft has fixed a known issue causing the June 2026 security updates to fail on Windows Server 2016 systems that weren't up to date. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
A known issue with Windows Server 2016 security updates caused installation failures, primarily affecting customers who didn't install the required KB5087537 update before installing KB5094122. The issue has now been resolved by Microsoft.
⚙️Technical Details
Affected Systems
Windows Server 2016
Attack Vectors
KB5094122 update installation without first installing KB5087537
💥Impact Assessment
Severity: critical
Who Is at Risk
IT administrators and customers running Windows Server 2016 systems that weren't up to date
🛡️Recommended Actions
1Ensure all necessary security updates are installed before deploying new updates
2Verify sufficient free space on the EFI System Partition (ESP)
3Monitor system logs for error codes 0x80070002 or 0x800f0922 during update installation
📦Affected Products
Windows Server 2016
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