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-2018-8440
Microsoft Windows
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U H H H 7.8 .1839 97.2 YES
AFFECTED
Product Versions Fixed
Windows 7 32-bit Systems Service Pack 1 – —
Windows Server 2012 R2 (Server Core installation) – —
Windows RT 8.1 Windows RT 8.1 – —
Windows Server 2008 32-bit Systems Service Pack 2 – —
Windows Server 2012 (Server Core installation) – —
Windows 8.1 32-bit systems – —
Windows Server 2016 (Server Core installation) – —
Windows Server 2008 R2 Itanium-Based Systems Service Pack 1 – —
Windows 10 32-bit Systems – —
Windows 10 Servers version 1709 (Server Core Installation) – —
TIMELINE
Mar 14 Reserved by microsoft
Sep 13 Published (CNA: microsoft)
Mar 28 Added to CISA KEV, remediation due 2022-04-18
Description
An elevation of privilege vulnerability exists when Windows improperly handles calls to Advanced Local Procedure Call (ALPC), aka "Windows ALPC Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| March 14, 2018 | Reserved | Reserved by microsoft |
| September 13, 2018 | Published | Published (CNA: microsoft) |
| March 28, 2022 | KEV ADDED | Added to CISA KEV, remediation due 2022-04-18 |
Affected
Affected products and packages — 10 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Microsoft | Windows 7 | — | 32-bit Systems Service Pack 1 | — |
| Microsoft | Windows Server 2012 R2 | — | (Server Core installation) | — |
| Microsoft | Windows RT 8.1 | — | Windows RT 8.1 | — |
| Microsoft | Windows Server 2008 | — | 32-bit Systems Service Pack 2 | — |
| Microsoft | Windows Server 2012 | — | (Server Core installation) | — |
| Microsoft | Windows 8.1 | — | 32-bit systems | — |
| Microsoft | Windows Server 2016 | — | (Server Core installation) | — |
| Microsoft | Windows Server 2008 R2 | — | Itanium-Based Systems Service Pack 1 | — |
| Microsoft | Windows 10 | — | 32-bit Systems | — |
| Microsoft | Windows 10 Servers | — | version 1709 (Server Core Installation) | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2018-8440 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.
