Patch tracker / KB5101650
KB5101650: Windows 11 Version 25H2 Security Update (July 2026)
KB5101650 is a Critical security update for Windows 11 Version 25H2, released 2026-07-14. It closes 381 CVEs with a maximum CVSS of 9.9. At least one of them is actively exploited (CISA KEV), so this is a deploy-first update. It is the third largest of the 61 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 381 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 9.9 (Critical). EPSS exploit probability up to 4.9%. Among the top half of tracked Microsoft updates by EPSS exploit probability.
A newer security update for Windows 11 Version 25H2 for ARM64-based Systems has shipped since this one: KB5127648 (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 1 known issue with this update.
- Microsoft is not currently aware of any issues with this update.
KB5101650 is a Security Update for Windows 11 versions 24H2 and 25H2 on both ARM64 and x64 systems, addressing CVE-2026-50661, a publicly disclosed BitLocker flaw. Because BitLocker sits at the disk encryption layer, this exposes any Windows 11 endpoint relying on it for data at rest protection, and the public disclosure means attack details are already circulating ahead of full CVE documentation.
Do this: Deploy KB5101650 to all Windows 11 24H2 and 25H2 devices, prioritizing BitLocker-encrypted laptops and any machines with physical exposure risk.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5101650
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5101650
- Released
- 2026-07-14
- Last changed
- 2026-10-13
- Changes tracked
- 7
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.
Microsoft revised KB5101650 on 2026-10-13: CVEs fixed 380 to 381.
- 2026-07-29 CVEs fixed 379 to 380
- 2026-10-13 CVEs fixed 380 to 381
Recorded by Senserva on the dates shown, from the MSRC release feed. This is what moved and when, which neither the vendor advisory nor NVD publishes.
Check if KB5101650 is installed
Elevated PowerShell. No output means it is not installed.
Known issues, from Microsoft
Quoted from Microsoft's support article for KB5101650 (checked 2026-10-13). Verify against the article before acting.
Microsoft is not currently aware of any issues with this update.
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 July 2026
KB5099444
186 CVEs · Critical · exploitedKB5099445
175 CVEs · Critical · exploitedKB5099535
262 CVEs · Critical · exploitedKB5099536
390 CVEs · Critical · exploitedKB5099538
313 CVEs · Critical · exploitedKB5099539
315 CVEs · Critical · exploitedKB5099540
327 CVEs · Critical · exploitedKB5101649
384 CVEs · Critical · exploitedThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.