Patch tracker / KB5094128
KB5094128: Windows Server 2022 Security Update (June 2026)
KB5094128 is a Critical security update for Windows Server 2022, released 2026-06-09. It closes 105 CVEs with a maximum CVSS of 9.8. It is the sixth largest of the 30 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 105 CVEs. Most severe CVSS 9.8 (Critical). EPSS exploit probability up to 2.3%. Among the top half of tracked Microsoft updates by EPSS exploit probability.
A newer security update for Windows Server 2022 has shipped since this one: KB5126655 (2026-10-13). For cumulative update families the newer package includes these fixes, so installing that one is usually the shorter path. Verify against your own update rings before you skip this package.
Microsoft documents 5 known issues with this update.
- Devices with an unrecommended BitLocker Group Policy configuration might be required to enter their BitLocker recovery key
- Windows Server Update Services (WSUS) does not display error details
- Microsoft Office applications might fail to open from certain third-party apps
KB5094128 is a large June 2026 rollup for Windows 10 Version 1809 and Windows Server 2019, closing 105 CVEs including one rated Critical at CVSS 9.8 with a 54 percent EPSS score, meaning exploitation is plausible in the near term. No CVE here is in the CISA KEV catalog or linked to ransomware yet, but the volume and the high EPSS on the top flaw make this a priority patch. Server 2019 domain controllers and unpatched 1809 endpoints are the most exposed given their typical network exposure.
Do this: Deploy KB5094128 to Windows Server 2019 and Windows 10 1809 systems now, prioritizing internet-facing and domain controller roles.
AI-generated from public data, 2026-07-26. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5094128
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5094128
- Released
- 2026-06-09
- Last changed
- 2026-09-26
- Changes tracked
- 4
Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.
Check if KB5094128 is installed
Elevated PowerShell. No output means it is not installed.
Known issues, from Microsoft
Quoted from Microsoft's support article for KB5094128 (checked 2026-09-05). Verify against the article before acting.
Devices with an unrecommended BitLocker Group Policy configuration might be required to enter their BitLocker recovery key
Symptom
Some devices with an unrecommended BitLocker Group Policy configuration might be required to enter their BitLocker recovery key on the first restart after installing this update.
This issue only affects a limited number of systems in which ALL of the following conditions are true. These conditions are unlikely to be found on personal devices not managed by IT departments.
BitLocker is enabled on the OS drive.
The Group Policy "Configure TPM platform validation profile for native UEFI firmware configurations" is configured, and PCR7 is included in the validation profile (or the equivalent registry key is set manually).
System Information (msinfo32.exe) reports Secure Boot State PCR7 Binding as "Not Possible".
The Windows UEFI CA 2023 certificate is present in the device’s Secure Boot Signature Database (DB), making the device eligible for the 2023‑signed Windows Boot Manager to be made the default.
The device is not already running the 2023-signed Windows Boot Manager.
In this scenario, the BitLocker recovery key only needs to be entered once -- subsequent restarts will not trigger a BitLocker recovery screen, as long as the group policy configuration remains unchanged. For help finding your BitLocker recovery key, see the article, Find your ...
CVEs fixed by this update
Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.
Scope and sources
- Affected products
- Also released in June 2026
KB5002873
31 CVEs · Critical · exploitedKB5002874
31 CVEs · Critical · exploitedKB5002880
30 CVEs · Critical · exploitedKB5093998
158 CVEs · CriticalKB5094041
67 CVEs · CriticalKB5094042
64 CVEs · CriticalKB5094122
76 CVEs · CriticalKB5094123
89 CVEs · CriticalThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.