HIGH KEV Used in ransomware campaigns ⚠
A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution 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 ·Due Aug 15, 2022
7.5
HIGHCVSS 3.1
EPSS 88.33%
Description
A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution 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 |
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| 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
- 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.
7.5 HIGH NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
No CVSS v3.0 score for this CVE.
7.6 HIGH NVD
AV:N/AC:H/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity High
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
Listed in CISA KEV KEV Used in ransomware campaigns ⚠
Date Added
Feb 15, 2022
Patch Due
Aug 15, 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
88.33% 0.88332
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.88332
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 (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 88.33% (0.88332) | 99.77th | v5 (v2026.06.15) |
| Jun 15, 2026 | 87.81% (0.87814) | 99.74th | v5 (v2026.06.15) |
| Mar 17, 2025 | 94.28% (0.94283) | 99.93th | v4 (v2025.03.14) |
| Dec 12, 2024 | 97.32% (0.97316) | 99.91th | v3 (v2023.03.01) |
| Jul 4, 2024 | 97.42% (0.97417) | 99.94th | v3 (v2023.03.01) |
| Mar 18, 2024 | 97.45% (0.97453) | 99.95th | v3 (v2023.03.01) |
| Feb 22, 2024 | 97.47% (0.97466) | 99.96th | v3 (v2023.03.01) |
| Dec 3, 2023 | 97.43% (0.97433) | 99.93th | v3 (v2023.03.01) |
| Aug 1, 2023 | 97.45% (0.97445) | 99.91th | v3 (v2023.03.01) |
| May 21, 2023 | 97.42% (0.97418) | 99.88th | v3 (v2023.03.01) |
| May 8, 2023 | 97.44% (0.97441) | 99.90th | v3 (v2023.03.01) |
| May 3, 2023 | 97.42% (0.97418) | 99.87th | v3 (v2023.03.01) |
| Mar 15, 2023 | 97.44% (0.97444) | 99.89th | v3 (v2023.03.01) |
| Mar 7, 2023 | 97.43% (0.97433) | 99.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 91.47% (0.91472) | 99.88th | v2 (v2022.01.01) |
| Feb 4, 2022 | 91.47% (0.91472) | 99.86th | v2 (v2022.01.01) |
| Feb 3, 2022 | 54.45% (0.54455) | 99.12th | v1 |
| Sep 1, 2021 | 54.45% (0.54455) | 99.72th | v1 |
| Apr 14, 2021 | 54.45% (0.54455) | 0.00th | v1 |
Weaknesses (1)
References (5)
- http://www.securityfocus.com/bid/103998 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://blog.0patch.com/2018/05/a-single-instruction-micropatch-for.html x_refsource_MISCExploitTechnical DescriptionThird Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8174 x_refsource_CONFIRMPatchVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8174 government-resourceUS Government Resource
- https://www.exploit-db.com/exploits/44741/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/103998 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://blog.0patch.com/2018/05/a-single-instruction-micropatch-for.html | x_refsource_MISCExploitTechnical DescriptionThird Party Advisory | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8174 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8174 | government-resourceUS Government Resource | |
| https://www.exploit-db.com/exploits/44741/ | exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published May 9, 2018
Updated Aug 13, 2026
Reserved Mar 14, 2018
Link CVE-2018-8174
CISA Vulnrichment
Updated Feb 7, 2025