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ExploitedIn CISA KEVFix available

CVE-2018-8440

Exploitation confirmed. First attested on 2022-03-28 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2018-09-13

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2018-09-1300:29CVE publishedNVD
  2. 2022-03-28Added to the CISA KEV catalogCISA KEV
  3. 2022-03-28Listed as exploited by GCVEGCVE
  4. 2022-03-28Exploitation first reportedCISA KEV
  5. 2025-02-0716:24SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 03:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-8440?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-8440?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Microsoft windows server 2008
BranchAffectedFixed in
—all versionsno fix published
—= r2no fix published
Microsoft windows server 2012
BranchAffectedFixed in
—all versionsno fix published
—= r2no fix published
Microsoft windows 10 1607
BranchAffectedFixed in
—all versionsno fix published

7 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA10 products

As microsoft, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Microsoft Windows 7
    Affected
    • = 32-bit Systems Service Pack 1no fix stated
    • = x64-based Systems Service Pack 1no fix stated
  • Microsoft Windows Server 2012 R2
    Affected
    • = (Server Core installation)no fix stated
  • Microsoft Windows RT 8.1
    Affected
    • = Windows RT 8.1no fix stated
  • Microsoft Windows Server 2008
    Affected
    • = 32-bit Systems Service Pack 2no fix stated
    • = 32-bit Systems Service Pack 2 (Server Core installation)no fix stated
    • = Itanium-Based Systems Service Pack 2no fix stated
    • = x64-based Systems Service Pack 2no fix stated
    • = x64-based Systems Service Pack 2 (Server Core installation)no fix stated
  • Microsoft Windows Server 2012
    Affected
    • = (Server Core installation)no fix stated
  • Microsoft Windows 8.1
    Affected
    • = 32-bit systemsno fix stated
    • = x64-based systemsno fix stated

4 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2018-09-13

Fix

  1. CISA’s required action: Apply updates per vendor instructions.due 2022-04-18

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedsourceincite/CVE-2018-8440
PoC-in-GitHub
Metasploit modules
1 moduleexploit/windows/local/alpc_taskschedulerrank: normalModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-03-28
Patch Due Date
2022-04-18
Ransomware Use
Known
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2018-09-13
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-jw7v-w46m-p6pp

Frequently asked questions

What is CVE-2018-8440?

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.

Is CVE-2018-8440 actively exploited?

Yes. CVE-2018-8440 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-04-18.

What is the CVSS score for CVE-2018-8440?

CVE-2018-8440 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record