CVEs / CVE-2018-8174
CVE-2018-8174: Microsoft Windows VBScript Engine Out-of-Bounds Write Vulnerability
- Known exploited in the CISA KEV catalog since 15 Feb 2022
- high 7.5 CVSS 3.1 (NVD)
- EPSS 88.2% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution"
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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows 7 | 32-bit Systems Service Pack 1 | — |
| Microsoft Windows 7 | x64-based Systems Service Pack 1 | — |
| Microsoft Windows Server 2012 R2 | (Server Core installation) | — |
| Microsoft Windows RT 8.1 | Windows RT 8.1 | — |
| Microsoft Windows Server 2008 | 32-bit Systems Service Pack 2 | — |
| Microsoft Windows Server 2008 | 32-bit Systems Service Pack 2 (Server Core installation) | — |
| Microsoft Windows Server 2008 | Itanium-Based Systems Service Pack 2 | — |
| Microsoft Windows Server 2008 | x64-based Systems Service Pack 2 | — |
| Microsoft Windows Server 2008 | x64-based Systems Service Pack 2 (Server Core installation) | — |
| Microsoft Windows Server 2012 | (Server Core installation) | — |
| Microsoft Windows 8.1 | 32-bit systems | — |
| Microsoft Windows 8.1 | x64-based systems | — |
| Microsoft Windows Server 2016 | (Server Core installation) | — |
| Microsoft Windows Server 2008 R2 | Itanium-Based Systems Service Pack 1 | — |
| Microsoft Windows Server 2008 R2 | x64-based Systems Service Pack 1 | — |
| Microsoft Windows Server 2008 R2 | x64-based Systems Service Pack 1 (Server Core installation) | — |
| Microsoft Windows 10 | 32-bit Systems | — |
| Microsoft Windows 10 | Version 1607 for 32-bit Systems | — |
| Microsoft Windows 10 | Version 1607 for x64-based Systems | — |
| Microsoft Windows 10 | Version 1703 for 32-bit Systems | — |
| Microsoft Windows 10 | Version 1703 for x64-based Systems | — |
| Microsoft Windows 10 | Version 1709 for 32-bit Systems | — |
| Microsoft Windows 10 | Version 1709 for x64-based Systems | — |
| Microsoft Windows 10 | Version 1803 for 32-bit Systems | — |
| Microsoft Windows 10 | Version 1803 for x64-based Systems | — |
| Microsoft Windows 10 | x64-based Systems | — |
| Microsoft Windows 10 Servers | version 1709 (Server Core Installation) | — |
| Microsoft Windows 10 Servers | version 1803 (Server Core Installation) | — |
Exploitation
| In CISA KEV since | 15 Feb 2022 |
|---|---|
| Due date for US federal agencies | 15 Aug 2022 |
| Used in ransomware campaigns | Known |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 7.5 highCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-787 |
References
- CVE-2018-8174 on NVD
- CVE-2018-8174 in the CISA KEV catalog
- http://www.securityfocus.com/bid/103998 Third Party Advisory, VDB Entry
- https://blog.0patch.com/2018/05/a-single-instruction-micropatch-for.html Exploit, Technical Description, Third Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8174 Patch, Vendor Advisory
- https://www.exploit-db.com/exploits/44741/ Exploit, Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8174 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.