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

Vulnerability summary

CVE-2018-8174 is a high (CVSS 7.6) Out-of-bounds Write vulnerability in Microsoft Windows. It is known to be exploited: CISA lists it, first on 15-02-2022. It has been used in ransomware campaigns. EPSS estimates a 88.24% chance of exploitation in the next 30 days, higher than 99.7% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 09-05-2018
   PublishedVulnerability first disclosed.
2. 15-02-2022
   Added to CISA KEVMicrosoft Windows VBScript Engine Out-of-Bounds Write Vulnerability
3. 15-08-2022
   CISA remediation dueApply updates per vendor instructions.
4. 13-08-2026
   Last modifiedVulnerability information updated.

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.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.