Reference page — cumulative record through Wednesday, October 7, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2021-36948
Microsoft Windows 10 Version 1809 — Windows Update Medic Service Elevation of Privilege Vulnerability
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U H H H 7.8 .2327 97.7 YES
AFFECTED
Product Versions Fixed
Windows 10 Version 1809 10.0.17763.0 – —
Windows 10 Version 1809 10.0.0 – —
Windows 10 Version 1909 10.0.0 – —
Windows 10 Version 2004 10.0.0 – —
Windows 10 Version 20H2 10.0.0 – —
Windows 10 Version 21H1 10.0.0 – —
Windows Server 2019 10.0.17763.0 – —
Windows Server 2019 (Server Core installation) 10.0.17763.0 – —
Windows Server version 2004 10.0.0 – —
Windows Server version 20H2 10.0.0 – —
TIMELINE
Jul 19 Reserved by microsoft
Nov 3 Added to CISA KEV, remediation due 2021-11-17
Nov 3 Published (CNA: microsoft)
Description
Windows Update Medic Service Elevation of Privilege Vulnerability
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| July 19, 2021 | Reserved | Reserved by microsoft |
| November 3, 2021 | KEV ADDED | Added to CISA KEV, remediation due 2021-11-17 |
| November 3, 2021 | Published | Published (CNA: microsoft) |
Affected
Affected products and packages — 10 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Microsoft | Windows 10 Version 1809 | — | 10.0.17763.0 | — |
| Microsoft | Windows 10 Version 1809 | — | 10.0.0 | — |
| Microsoft | Windows 10 Version 1909 | — | 10.0.0 | — |
| Microsoft | Windows 10 Version 2004 | — | 10.0.0 | — |
| Microsoft | Windows 10 Version 20H2 | — | 10.0.0 | — |
| Microsoft | Windows 10 Version 21H1 | — | 10.0.0 | — |
| Microsoft | Windows Server 2019 | — | 10.0.17763.0 | — |
| Microsoft | Windows Server 2019 (Server Core installation) | — | 10.0.17763.0 | — |
| Microsoft | Windows Server version 2004 | — | 10.0.0 | — |
| Microsoft | Windows Server version 20H2 | — | 10.0.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-36948 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, October 7, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
