Which products and versions are affected by CVE-2018-8440?

Affected: Windows 10 1607 (Microsoft); Windows 10 1703 (Microsoft); Windows 10 1709 (Microsoft), among others. The full list is in the CVE brief.

Is CVE-2018-8440 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 5, 2018 and is known to be used in ransomware campaigns.

Is CVE-2018-8440 in the CISA KEV catalog?

Yes. It was added on Mar 28, 2022 with a federal remediation due date of Apr 18, 2022.

Is there a public exploit for CVE-2018-8440?

Public exploit code is available.

Is there a fix for CVE-2018-8440?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2018-8440 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2018-8440

HighExploitedPublic exploit

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…

Published Sep 12, 2018 · Updated Oct 28, 2025

Key Facts

Patch immediately

CVE-2018-8440 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Windows 10 1607 (Microsoft), Windows 10 1703 (Microsoft), Windows 10 1709 (Microsoft) and 11 more products.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 5, 2018 and is known to be used in ransomware campaigns. Public exploit code is available.
EPSS estimates a 18% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

7.8

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

18%

Higher than 97.2% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings, used by ransomware

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2018-8440 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Mar 28, 2022	Apr 18, 2022	Known
Industry KEV feed	Sep 5, 2018	Apr 18, 2022	Known
CIRCL KEV	Mar 28, 2022	Apr 18, 2022	Known
ENISA EUVD	Mar 28, 2022	n/a	Not reported

Required action: Apply updates per vendor instructions.

Affected Products

22 affected entries in total

Product	Affected versions	Fixed in
Windows 10 1607Microsoft	See advisory	n/a
Windows 10 1703Microsoft	See advisory	n/a
Windows 10 1709Microsoft	See advisory	n/a
Windows 10 1803Microsoft	See advisory	n/a
Windows 7Microsoft	>= 32-bit Systems Service Pack 1	n/a

9 more affected products in the full CVE brief

Timeline

Added to Industry KEV feed
Sep 5, 2018
Publicly disclosed
Sep 12, 2018
Added to CISA KEV
Mar 28, 2022
Added to CIRCL KEV
Mar 28, 2022
Added to ENISA EUVD
Mar 28, 2022
Last updated
Oct 28, 2025

References

8 more references in the full CVE brief

FAQ

Common Questions.

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 20…
Affected: Windows 10 1607 (Microsoft); Windows 10 1703 (Microsoft); Windows 10 1709 (Microsoft), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 5, 2018 and is known to be used in ransomware campaigns.
Yes. It was added on Mar 28, 2022 with a federal remediation due date of Apr 18, 2022.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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