Exploited· due 2022-08-157.5highHighused in ransomware

CVE-2018-8174

Microsoft Windows 10 1607

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.

Exploitation status

CISA has confirmed this is being exploited in the wild. That is an observation of real attacks, not a prediction.
It is known to have been used in ransomware campaigns.
US federal civilian agencies are required to remediate it by 2022-08-15. That deadline does not bind private companies, but it is a reasonable benchmark for how urgently CISA views it.
A vendor advisory or patch reference has been published.

Required action

Apply updates per vendor instructions.

CISA’s wording, unedited.

What the metrics mean

It is reachable over a network, without needing local access.
For an attacker who can reach it, exploitation depends on conditions outside the attacker's control.
To exploit it, no account is needed.
Beyond that, someone has to be persuaded to take an action first.

Scoring

CVSS: 7.5 (v3.1)
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-787
Assigned by: secure@microsoft.com

Dates

Published: 2018-05-09
Last modified: 2026-08-13
Added to KEV: 2022-02-15
Remediation due: 2022-08-15
Sources: CISA KEV, NVD

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 2008all versions, r2
Microsoft Windows Server 2012all versions, r2
Microsoft Windows Server 2016all versions

As listed in the NVD configuration data. Not a statement about your estate.