CVE-2018-8373

HIGH7.5

CISA KEV

Published 2018-08-15 · Updated 2026-06-17 · Source secure@microsoft.com

Summary

CVE-2018-8373 is a high-severity (CVSS 7.5) vulnerability in Microsoft Internet Explorer Scripting Engine. CISA added it to the Known Exploited Vulnerabilities catalog on March 25, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 15, 2022. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

Description

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-8353, CVE-2018-8355, CVE-2018-8359, CVE-2018-8371, CVE-2018-8372, CVE-2018-8385, CVE-2018-8389, CVE-2018-8390.

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-787CWE-787

CISA Known-Exploited Vulnerability

Product: Microsoft — Internet Explorer Scripting Engine

Name: Microsoft Scripting Engine Memory Corruption Vulnerability

Date added: 2022-03-25 · Due: 2022-04-15

Required action: Apply updates per vendor instructions.

References

View on NVD

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