MEDIUM
An information disclosure vulnerability exists when Windows Hyper-V on a host operating system fails to properly validate input from an authenticated user on a guest operating system, aka "Windows Hyper-V Information Disclosure 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
5.4
MEDIUMCVSS 3.0
EPSS 3.49%
Description
An information disclosure vulnerability exists when Windows Hyper-V on a host operating system fails to properly validate input from an authenticated user on a guest operating system, aka "Windows Hyper-V Information Disclosure 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 Version 1607 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1703 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1709 for x64-based 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 x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version
-
- Version x64-based systemsStatusaffectedConstraints-
- Version
-
- Version Windows RT 8.1StatusaffectedConstraints-
- Version
-
- Version x64-based Systems Service Pack 2StatusaffectedConstraints-
- Version x64-based Systems Service Pack 2 (Server Core installation)StatusaffectedConstraints-
- Version
-
- 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
- sp2
- 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.
5.4 MEDIUM NVD
CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N
Attack Vector Adjacent
Attack Complexity High
Privileges Required High
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact None
Availability Impact None
5.2 MEDIUM NVD
AV:A/AC:M/Au:S/C:C/I:N/A:N
Access Vector Adjacent
Access Complexity Medium
Authentication Single
Confidentiality Impact Complete
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.49% 0.03494
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03494
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 (22 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.49% (0.03494) | 88.76th | v5 (v2026.06.15) |
| Sep 22, 2026 | 3.49% (0.03494) | 88.63th | v5 (v2026.06.15) |
| Sep 21, 2026 | 1.92% (0.01921) | 78.74th | v5 (v2026.06.15) |
| Sep 6, 2026 | 3.49% (0.03494) | 88.37th | v5 (v2026.06.15) |
| Sep 5, 2026 | 1.92% (0.01921) | 78.30th | v5 (v2026.06.15) |
| Aug 30, 2026 | 3.49% (0.03494) | 88.31th | v5 (v2026.06.15) |
| Aug 28, 2026 | 1.92% (0.01921) | 78.17th | v5 (v2026.06.15) |
| Aug 24, 2026 | 3.49% (0.03494) | 88.24th | v5 (v2026.06.15) |
| Aug 23, 2026 | 1.92% (0.01921) | 78.09th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.49% (0.03494) | 87.59th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.26% (0.01258) | 78.01th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.09% (0.00089) | 39.98th | v3 (v2023.03.01) |
| Sep 6, 2023 | 0.09% (0.00091) | 38.24th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.08% (0.00079) | 32.90th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00059) | 23.09th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.42% (0.01418) | 73.14th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.42% (0.01418) | 71.15th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.42% (0.01418) | 50.43th | v2 (v2022.01.01) |
| Feb 3, 2022 | 8.76% (0.08756) | 86.41th | v1 |
| Jan 6, 2022 | 8.76% (0.08756) | 86.25th | v1 |
| Sep 1, 2021 | 8.76% (0.08756) | 93.70th | v1 |
| Apr 14, 2021 | 8.76% (0.08756) | 0.00th | v1 |
References (3)
- http://www.securityfocus.com/bid/105239 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041624 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8434 x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105239 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041624 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8434 | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Sep 13, 2018
Updated Aug 5, 2024
Reserved Mar 14, 2018
Link CVE-2018-8434
CISA Vulnrichment
Updated n/a