HIGH KEV Used in ransomware campaigns ⚠
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
Published Sep 13, 2018 ·Due Apr 18, 2022
7.8
HIGHCVSS 3.1
EPSS 18.39%
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.
Affected products
-
- Version 32-bit SystemsStatusaffectedConstraints-
- Version Version 1607 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1607 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1703 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1703 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1709 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1709 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1803 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1803 for x64-based SystemsStatusaffectedConstraints-
- Version x64-based SystemsStatusaffectedConstraints-
- Version
-
- Version version 1709 (Server Core Installation)StatusaffectedConstraints-
- Version version 1803 (Server Core Installation)StatusaffectedConstraints-
- Version
-
- Version 32-bit Systems Service Pack 1StatusaffectedConstraints-
- Version x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version
-
- Version 32-bit systemsStatusaffectedConstraints-
- Version x64-based systemsStatusaffectedConstraints-
- Version
-
- Version Windows RT 8.1StatusaffectedConstraints-
- Version
-
- Version 32-bit Systems Service Pack 2StatusaffectedConstraints-
- Version 32-bit Systems Service Pack 2 (Server Core installation)StatusaffectedConstraints-
- Version Itanium-Based Systems Service Pack 2StatusaffectedConstraints-
- Version x64-based Systems Service Pack 2StatusaffectedConstraints-
- Version x64-based Systems Service Pack 2 (Server Core installation)StatusaffectedConstraints-
- Version
-
- Version Itanium-Based Systems Service Pack 1StatusaffectedConstraints-
- Version x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version x64-based Systems Service Pack 1 (Server Core installation)StatusaffectedConstraints-
- Version
-
- Version (Server Core installation)StatusaffectedConstraints-
- Version
-
- Version (Server Core installation)StatusaffectedConstraints-
- Version
-
- Version (Server Core installation)StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Windows 10 | n/a |
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| Microsoft | Windows 10 Servers | n/a |
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| Microsoft | Windows 7 | n/a |
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| Microsoft | Windows 8.1 | n/a |
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| Microsoft | Windows RT 8.1 | n/a |
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| Microsoft | Windows Server 2008 | n/a |
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| Microsoft | Windows Server 2008 R2 | n/a |
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| Microsoft | Windows Server 2012 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2012 R2 | n/a |
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| Microsoft | Windows Server 2016 | n/a |
|
OR
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- r2
- n/a
- r2
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
7.8 HIGH NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
No CVSS v3.0 score for this CVE.
7.2 HIGH NVD
AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
Listed in CISA KEV KEV Used in ransomware campaigns ⚠
Date Added
Mar 28, 2022
Patch Due
Apr 18, 2022
Required Action
Apply updates per vendor instructions.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Feb 7, 2025 · SSVC 2.0.3
18.39% 0.18386
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.18386
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (50 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 18.39% (0.18386) | 97.15th | v5 (v2026.06.15) |
| Jun 15, 2026 | 18.53% (0.18530) | 96.88th | v5 (v2026.06.15) |
| Feb 23, 2026 | 74.53% (0.74534) | 98.82th | v4 (v2025.03.14) |
| Feb 18, 2026 | 75.98% (0.75980) | 98.88th | v4 (v2025.03.14) |
| Nov 21, 2025 | 74.95% (0.74949) | 98.81th | v4 (v2025.03.14) |
| Nov 18, 2025 | 77.62% (0.77622) | 99.07th | v4 (v2025.03.14) |
| Nov 7, 2025 | 74.94% (0.74937) | 98.80th | v4 (v2025.03.14) |
| Nov 6, 2025 | 77.72% (0.77715) | 98.94th | v4 (v2025.03.14) |
| Nov 4, 2025 | 80.90% (0.80904) | 99.10th | v4 (v2025.03.14) |
| Aug 4, 2025 | 77.72% (0.77715) | 98.95th | v4 (v2025.03.14) |
| Jul 6, 2025 | 76.17% (0.76175) | 98.86th | v4 (v2025.03.14) |
| Jun 19, 2025 | 74.33% (0.74331) | 98.76th | v4 (v2025.03.14) |
| Jun 18, 2025 | 75.53% (0.75534) | 98.82th | v4 (v2025.03.14) |
| Jun 15, 2025 | 78.09% (0.78086) | 98.95th | v4 (v2025.03.14) |
| Apr 9, 2025 | 75.19% (0.75186) | 98.82th | v4 (v2025.03.14) |
| Mar 30, 2025 | 77.02% (0.77022) | 98.91th | v4 (v2025.03.14) |
| Mar 29, 2025 | 73.85% (0.73849) | 98.45th | v4 (v2025.03.14) |
| Mar 28, 2025 | 77.02% (0.77022) | 98.90th | v4 (v2025.03.14) |
| Mar 27, 2025 | 73.85% (0.73849) | 98.70th | v4 (v2025.03.14) |
| Mar 20, 2025 | 77.02% (0.77022) | 98.94th | v4 (v2025.03.14) |
| Mar 19, 2025 | 73.85% (0.73849) | 98.73th | v4 (v2025.03.14) |
| Mar 17, 2025 | 77.02% (0.77022) | 98.92th | v4 (v2025.03.14) |
| Dec 12, 2024 | 96.83% (0.96832) | 99.75th | v3 (v2023.03.01) |
| Jun 28, 2024 | 96.83% (0.96832) | 99.70th | v3 (v2023.03.01) |
| Mar 15, 2024 | 97.10% (0.97098) | 99.76th | v3 (v2023.03.01) |
| Feb 25, 2024 | 97.09% (0.97092) | 99.75th | v3 (v2023.03.01) |
| Feb 3, 2024 | 97.27% (0.97268) | 99.83th | v3 (v2023.03.01) |
| Jan 12, 2024 | 97.23% (0.97226) | 99.80th | v3 (v2023.03.01) |
| Dec 22, 2023 | 97.26% (0.97260) | 99.82th | v3 (v2023.03.01) |
| Nov 17, 2023 | 97.32% (0.97325) | 99.86th | v3 (v2023.03.01) |
| Oct 30, 2023 | 97.36% (0.97355) | 99.86th | v3 (v2023.03.01) |
| Sep 24, 2023 | 97.33% (0.97326) | 99.83th | v3 (v2023.03.01) |
| Sep 6, 2023 | 97.27% (0.97273) | 99.78th | v3 (v2023.03.01) |
| Aug 22, 2023 | 97.24% (0.97237) | 99.75th | v3 (v2023.03.01) |
| Jul 19, 2023 | 97.22% (0.97216) | 99.73th | v3 (v2023.03.01) |
| Jul 8, 2023 | 97.20% (0.97203) | 99.71th | v3 (v2023.03.01) |
| Jun 13, 2023 | 97.25% (0.97245) | 99.74th | v3 (v2023.03.01) |
| May 10, 2023 | 97.34% (0.97338) | 99.80th | v3 (v2023.03.01) |
| Apr 8, 2023 | 97.33% (0.97330) | 99.78th | v3 (v2023.03.01) |
| Mar 26, 2023 | 97.40% (0.97402) | 99.84th | v3 (v2023.03.01) |
| Mar 11, 2023 | 97.42% (0.97421) | 99.86th | v3 (v2023.03.01) |
| Mar 7, 2023 | 97.40% (0.97401) | 99.83th | v3 (v2023.03.01) |
| Mar 6, 2023 | 25.55% (0.25551) | 96.99th | v2 (v2022.01.01) |
| Mar 9, 2022 | 25.55% (0.25551) | 95.58th | v2 (v2022.01.01) |
| Feb 4, 2022 | 26.45% (0.26453) | 95.73th | v2 (v2022.01.01) |
| Feb 3, 2022 | 82.72% (0.82718) | 99.88th | v1 |
| Sep 16, 2021 | 82.72% (0.82718) | 99.94th | v1 |
| Sep 14, 2021 | 39.31% (0.39311) | 99.31th | v1 |
| Sep 1, 2021 | 82.72% (0.82718) | 99.94th | v1 |
| Apr 14, 2021 | 82.72% (0.82718) | 0.00th | v1 |
Weaknesses (0)
No CWE recorded.
References (6)
- http://www.securityfocus.com/bid/105153 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041578 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://blog.0patch.com/2018/08/how-we-micropatched-publicly-dropped.html x_refsource_MISCExploitPatchThird Party Advisory
- https://blog.0patch.com/2018/09/comparing-our-micropatch-with.html x_refsource_MISCThird Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8440 x_refsource_CONFIRMPatchVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8440 government-resourceUS Government Resource
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105153 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041578 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://blog.0patch.com/2018/08/how-we-micropatched-publicly-dropped.html | x_refsource_MISCExploitPatchThird Party Advisory | |
| https://blog.0patch.com/2018/09/comparing-our-micropatch-with.html | x_refsource_MISCThird Party Advisory | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8440 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8440 | government-resourceUS Government Resource |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Sep 13, 2018
Updated Oct 21, 2025
Reserved Mar 14, 2018
Link CVE-2018-8440
CISA Vulnrichment
Updated Feb 7, 2025