# CVE-2018-8174: Microsoft Windows VBScript Engine Out-of-Bounds Write Vulnerability

Source: https://junglewise.ai/threats/cve-2018-8174-microsoft-windows-vbscript-engine-out-of-bounds-write  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-02-15. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2018-8174 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2022-02-15

A remote code execution vulnerability exists in the Microsoft VBScript engine due to the way it handles objects in memory. An attacker could exploit this out-of-bounds write vulnerability to execute arbitrary code in the context of the current user, typically via a specially crafted website or document.

Technologies: [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2018-8174 exploited in the wild?** Yes. CVE-2018-8174 is known to be exploited in the wild, first recorded on 15 February 2022. Treat it as urgent.

**How severe is CVE-2018-8174?** Critical severity, with a CVSS score of 7.5, published 15 February 2022.

**Which products and versions are affected?** Microsoft Windows 7 Service Pack 1; Microsoft Windows 8.1; Microsoft Windows RT 8.1; Microsoft Windows 10 1607, 1703, 1709, 1803; and 3 more.

**Is there a fix for CVE-2018-8174?** A patch was published on 2018-05-08: Microsoft released security updates and advisory. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2018-8174 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2018-8174?** Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft Windows 7 Service Pack 1
- Microsoft Windows 8.1
- Microsoft Windows RT 8.1
- Microsoft Windows 10 1607, 1703, 1709, 1803
- Microsoft Windows Server 2008 Service Pack 2, R2 Service Pack 1
- Microsoft Windows Server 2012 R2
- Microsoft Windows Server 2016 1709, 1803

## Timeline

- 2018-05-08: patched: Microsoft released security updates and advisory.
- 2022-02-15: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.
- 2022-02-15: disclosed: NVD publication date.

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