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CVE-2018-8440

CVSS 3.1 High 7.8Known exploited (CISA KEV)

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

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.

Official description from the CVE record, published by microsoft. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org

Key data

CVSS 3.1 High 7.8

Score published by CISA-ADP in the CVE record.

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

  • Attack vector: Local

    The attacker needs local access to the system, or to trick a user into running something.

  • Attack complexity: Low

    No special conditions are needed. The attack can be repeated at will.

  • Privileges required: Low

    A basic user account is needed.

  • User interaction: None

    No action from any user is needed.

  • Scope: Unchanged

    The impact stays within the vulnerable component.

  • Confidentiality impact: High

    Serious or total effect on the secrecy of data.

  • Integrity impact: High

    Serious or total effect on the trustworthiness of data.

  • Availability impact: High

    Serious or total effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.
Score
0.18530 (18.5% probability)
Percentile
97.3%
Scores of
Nov 10, 2026
Model
v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.
Name in the catalog
Microsoft Windows Privilege Escalation Vulnerability
Added to the catalog
Mar 28, 2022
Federal due date
Apr 18, 2022
Ransomware campaigns
Known use

CISA assessment as of Feb 7, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.
Exploitation
Recorded by CISA as active
Automatable
no
Technical impact
total

Affected products

Products listed in the CVE record, as the CNA published them.

  • Microsoft Windows 7

    • affected: 32-bit Systems Service Pack 1
    • affected: x64-based Systems Service Pack 1

  • Microsoft Windows Server 2012 R2

    • affected: (Server Core installation)

  • Microsoft Windows RT 8.1

    • affected: Windows RT 8.1

  • Microsoft Windows Server 2008

    • affected: 32-bit Systems Service Pack 2
    • affected: 32-bit Systems Service Pack 2 (Server Core installation)
    • affected: Itanium-Based Systems Service Pack 2
    • affected: x64-based Systems Service Pack 2
    • affected: x64-based Systems Service Pack 2 (Server Core installation)

  • Microsoft Windows Server 2012

    • affected: (Server Core installation)

  • Microsoft Windows 8.1

    • affected: 32-bit systems
    • affected: x64-based systems

  • Microsoft Windows Server 2016

    • affected: (Server Core installation)

  • Microsoft Windows Server 2008 R2

    • affected: Itanium-Based Systems Service Pack 1
    • affected: x64-based Systems Service Pack 1
    • affected: x64-based Systems Service Pack 1 (Server Core installation)

  • Microsoft Windows 10

    • affected: 32-bit Systems
    • affected: Version 1607 for 32-bit Systems
    • affected: Version 1607 for x64-based Systems
    • affected: Version 1703 for 32-bit Systems
    • affected: Version 1703 for x64-based Systems
    • affected: Version 1709 for 32-bit Systems
    • affected: Version 1709 for x64-based Systems
    • affected: Version 1803 for 32-bit Systems
    • affected: Version 1803 for x64-based Systems
    • affected: x64-based Systems

  • Microsoft Windows 10 Servers

    • affected: version 1709 (Server Core Installation)
    • affected: version 1803 (Server Core Installation)

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

  1. ID reserved
  2. Record published
  3. Added to CISA KEV
  4. Record last updated

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:29 UTC. Sources and licenses