Patch tracker / KB5071547
KB5071547: Windows Server 2022 Security Update (December 2025)
KB5071547 is a High security update for Windows Server 2022, released 2025-12-09. It closes 29 CVEs with a maximum CVSS of 8.8. At least one of them is actively exploited (CISA KEV), so this is a deploy-first update. It is the fifth largest of the 36 updates Microsoft shipped that month, by CVEs closed.
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Update summary
Fixes 29 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 2.5%. 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.
KB5071547 is a December 2025 rollup fixing 29 CVEs across Windows 11 25H2 (ARM64 and x64) and Windows 10 1809, topping out at High severity (CVSS 8.8). One of the included CVEs is listed in CISA KEV, so it is confirmed exploited in the wild even though EPSS remains low at 2 percent and none of the flaws are tied to ransomware yet. The wide spread from current 25H2 down to the older 1809 branch means both modern and legacy fleets need this same update.
Do this: Prioritize deploying KB5071547 to any Windows 10 1809 and Windows 11 25H2 systems because it patches a CVE already on the CISA KEV exploited list.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5071547
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5071547
- Released
- 2025-12-09
- 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 KB5071547 is installed
Elevated PowerShell. No output means it is not installed.
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.
| CVE | Severity | CVSS | EPSS | Exploited |
|---|---|---|---|---|
| CVE-2025-62221 | High | 7.8 | 4.6% | KEV |
| CVE-2025-62456 | High | 8.8 | 4.6% | No |
| CVE-2025-62549 | High | 8.8 | 4.6% | No |
| CVE-2025-54100 | High | 7.8 | 4.6% | No |
| CVE-2025-55233 | High | 7.8 | 4.6% | No |
| CVE-2025-59516 | High | 7.8 | 4.6% | No |
| CVE-2025-59517 | High | 7.8 | 4.6% | No |
| CVE-2025-62454 | High | 7.8 | 4.6% | No |
| CVE-2025-62457 | High | 7.8 | 4.6% | No |
| CVE-2025-62458 | High | 7.8 | 2.5% | No |
| CVE-2025-62461 | High | 7.8 | 4.6% | No |
| CVE-2025-62462 | High | 7.8 | 4.6% | No |
| CVE-2025-62464 | High | 7.8 | 4.6% | No |
| CVE-2025-62466 | High | 7.8 | 4.6% | No |
| CVE-2025-62467 | High | 7.8 | 4.6% | No |
| CVE-2025-62470 | High | 7.8 | 4.6% | No |
| CVE-2025-62472 | High | 7.8 | 4.6% | No |
| CVE-2025-62474 | High | 7.8 | 4.6% | No |
| CVE-2025-62571 | High | 7.8 | 4.6% | No |
| CVE-2025-64661 | High | 7.8 | 4.6% | No |
| CVE-2025-64673 | High | 7.8 | 4.6% | No |
| CVE-2025-64658 | High | 7.5 | 4.6% | No |
| CVE-2025-62565 | High | 7.3 | 4.6% | No |
| CVE-2025-62573 | High | 7.0 | 4.6% | No |
| CVE-2025-62463 | Medium | 6.5 | 4.6% | No |
| CVE-2025-62465 | Medium | 6.5 | 4.6% | No |
| CVE-2025-62473 | Medium | 6.5 | 4.6% | No |
| CVE-2025-64670 | Medium | 6.5 | 4.6% | No |
| CVE-2025-62567 | Medium | 5.3 | 4.6% | No |
Scope and sources
- Affected products
- Also released in December 2025
KB5071413
28 CVEs · High · exploitedKB5071417
30 CVEs · High · exploitedKB5071542
30 CVEs · High · exploitedKB5071544
26 CVEs · High · exploitedKB5071546
28 CVEs · High · exploitedKB5072014
33 CVEs · High · exploitedKB5072033
34 CVEs · High · exploitedKB5002815
1 CVE · HighThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.