CVE-2018-8440

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.185 · 97 %ileexploit · functionalEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 2 exploits · functional

Likely / severe?

18.5% (97th) EPSS

CVSS 7.2 · high

Is it mine?

47 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · fstec_bdu

added 2022-03-28remediate by 2022-04-18

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Microsoft Windows Privilege Escalation Vulnerability

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.

cvss

Technical severity, 0–10. One row per scoring source.

8.4

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.18.4highAV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-264US

exploits (2)

Public proof-of-concept and weaponised exploit code.

exploit/windows/local/alpc_taskschedulerMicrosoft Windows ALPC Task Scheduler Local Privilege Elevationfunctional · metasploit
sourceincite/CVE-2018-8440CVE-2018-8440 standalone exploitPoC · poc_in_github

affected products (47)

Products and version ranges known to be affected.

Microsoft Windows 10≤ Version 1803 for 32-bit Systemsenisa_euvdEU
Microsoft Windows 10≤ Version 1709 for 32-bit Systemsenisa_euvdEU
Microsoft Windows 10≤ Version 1803 for x64-based Systemsenisa_euvdEU
Microsoft Windows 10≤ Version 1607 for 32-bit Systemsenisa_euvdEU
Microsoft Windows 10≤ Version 1709 for x64-based Systemsenisa_euvdEU
Microsoft Windows 10≤ Version 1703 for x64-based Systemsenisa_euvdEU
Microsoft Windows 10≤ Version 1607 for x64-based Systemsenisa_euvdEU
Microsoft Windows 10≤ x64-based Systemsenisa_euvdEU
Microsoft Windows 10≤ 32-bit Systemsenisa_euvdEU
Microsoft Windows 10≤ Version 1703 for 32-bit Systemsenisa_euvdEU
Microsoft Windows 10 Servers≤ version 1709 (Server Core Installation)enisa_euvdEU
Microsoft Windows 10 Servers≤ version 1803 (Server Core Installation)enisa_euvdEU
Microsoft Windows 7≤ 32-bit Systems Service Pack 1enisa_euvdEU
Microsoft Windows 7≤ x64-based Systems Service Pack 1enisa_euvdEU
Microsoft Windows 8.1≤ 32-bit systemsenisa_euvdEU
Microsoft Windows 8.1≤ x64-based systemsenisa_euvdEU
Microsoft Windows RT 8.1≤ Windows RT 8.1enisa_euvdEU
Microsoft Windows Server 2008≤ 32-bit Systems Service Pack 2 (Server Core installation)enisa_euvdEU
Microsoft Windows Server 2008≤ Itanium-Based Systems Service Pack 2enisa_euvdEU
Microsoft Windows Server 2008≤ 32-bit Systems Service Pack 2enisa_euvdEU

showing 20 of 47

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu NVD CVE.org MITRE

published 2018-09-13modified 2026-06-17

references (17)

External citations — patches, advisories, analysis.

scry

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