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CVE-2018-8174

Microsoft Windows VBScript Engine Out-of-Bounds Write

7.5 HIGHActively exploited (CISA KEV)Used in ransomwarePublic exploitEPSS 88.3%
  1. Published9 May 2018
  2. Added to CISA KEV15 Feb 2022
  3. Remediation due15 Aug 2022
Actively exploited (CISA KEV)

A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution"

Added to KEV: 15 Feb 2022Federal remediation due: 15 Aug 2022Used in ransomware

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 1607all versions
Microsoft Windows 10 1703all versions
Microsoft Windows 10 1709all versions
Microsoft Windows 10 1803all versions
Microsoft Windows 7all versions
Microsoft Windows 8.1all versions
Microsoft Windows Rt 8.1all versions
Microsoft Windows Server 2008r2
Microsoft Windows Server 2012r2
Microsoft Windows Server 2016all versions

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2018-8174 being actively exploited?

Yes. CVE-2018-8174 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 15 Feb 2022. It has been used in ransomware campaigns.

How severe is CVE-2018-8174?

CVE-2018-8174 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 88.3% probability of exploitation.

Which products are affected by CVE-2018-8174?

Affected products include Microsoft Windows 10 1607, Microsoft Windows 10 1703, Microsoft Windows 10 1709, Microsoft Windows 10 1803, Microsoft Windows 7, and 5 more.

How do I fix CVE-2018-8174?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2018-8174 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.