HIGH
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k 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 May 9, 2018
7.0
HIGHCVSS 3.0
EPSS 1.24%
Description
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k 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. This CVE ID is unique from CVE-2018-8120, CVE-2018-8124, CVE-2018-8164.
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 |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows 10 Servers | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows 7 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows 8.1 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows RT 8.1 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2008 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2008 R2 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2012 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2012 R2 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2016 | n/a |
|
OR
- n/a
- 1607
- 1703
- 1709
- 1803
- n/a
- n/a
- n/a
- n/a
- r2
- n/a
- r2
- n/a
- 1709
- 1803
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.
No CVSS v3.1 score for this CVE.
7.0 HIGH NVD
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
6.9 MEDIUM NVD
AV:L/AC:M/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.24% 0.01245
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01245
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 (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.24% (0.01245) | 68.18th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.17% (0.01169) | 63.19th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.77% (0.00766) | 71.73th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00059) | 27.21th | v3 (v2023.03.01) |
| May 22, 2024 | 0.06% (0.00059) | 25.02th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.06% (0.00059) | 22.91th | v3 (v2023.03.01) |
| May 8, 2023 | 0.10% (0.00095) | 38.63th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00059) | 22.84th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01410) | 72.96th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01410) | 72.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01410) | 70.94th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01410) | 50.00th | v2 (v2022.01.01) |
| Feb 3, 2022 | 6.70% (0.06701) | 83.28th | v1 |
| Jan 6, 2022 | 6.70% (0.06701) | 83.12th | v1 |
| Sep 1, 2021 | 6.70% (0.06701) | 91.08th | v1 |
| Apr 14, 2021 | 6.70% (0.06701) | 0.00th | v1 |
Weaknesses (1)
References (2)
- http://www.securityfocus.com/bid/104062 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8166 x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/104062 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8166 | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published May 9, 2018
Updated Aug 5, 2024
Reserved Mar 14, 2018
Link CVE-2018-8166
CISA Vulnrichment
Updated n/a