CVE-2018-8174

A remote code execution vulnerability exists in the way that the VBScript engine handles objects...

7.5 HighIn KEVPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

88.2%Up 33.8 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2018-8174
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 7.6 HighAV:N/AC:H/Au:N/C:C/I:C/A:C
Weakness: CWE-787
Updated: 2026-11-02

CVE List 7.5

Record: CVE-2018-8174
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

EUVDEUVD-2018-19844 7.5

Record: EUVD-2018-19844
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-5cv8-848m-hmm2 7.5

A remote code execution vulnerability exists in the way that the VBScript engine handles objects...

Record: GHSA-5cv8-848m-hmm2
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

CISA KEV No score

Microsoft Windows VBScript Engine Out-of-Bounds Write Vulnerability

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

Record: CVE-2018-8174
Weakness: CWE-787
Updated: 2026-11-02

Affected products

Show 3 moreShow less

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Microsoft Internet Explorer 11 (Windows 7 x86/x64) - vbscript Code Execution	2018-05-21
PoC in GitHub	0x09AL/CVE-2018-8174-msf	2018-05-22
PoC in GitHub	Yt1g3r/CVE-2018-8174_EXP	2018-05-30
PoC in GitHub	SyFi/CVE-2018-8174	2018-06-01
PoC in GitHub	orf53975/Rig-Exploit-for-CVE-2018-8174	2018-06-26
PoC in GitHub	piotrflorczyk/cve-2018-8174_analysis	2018-07-10
PoC in GitHub	likekabin/CVE-2018-8174-msf	2018-09-06
PoC in GitHub	ruthlezs/ie11_vbscript_exploit	2019-05-23
PoC in GitHub	ericisnotrealname/CVE-2018-8174_EXP	2020-07-31
PoC in GitHub	lisinan988/CVE-2018-8174-exp	2021-11-25

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation, exploits
Nov 2, 2026	first indexed	CVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-8174 is a high vulnerability (CVSS 7.5) in Microsoft Windows, published May 9, 2018. CISA lists it as known to be exploited, since February 15, 2022. EUVD reports exploitation since February 15, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 88.2%, the 99th percentile. No source names a fixed version.