# CVE-2018-8373: Microsoft Scripting Engine Memory Corruption Vulnerability

> CVE-2018-8373: Microsoft Scripting Engine Memory Corruption Vulnerability. CVSS 7.5 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-8373
Last updated: 2025-10-21T23:45:48Z

- Published: 2018-08-15 17:00 UTC · Updated: 2025-10-21 23:45 UTC · Assigner: microsoft
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 61.5%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-25, federal due date 2022-04-15, ransomware use: Unknown

## 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Microsoft: Internet Explorer 10
- Microsoft: Internet Explorer 11
- Microsoft: Internet Explorer 9

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-8373)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-8373)
- [https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8373](https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8373)
- [http://www.securityfocus.com/bid/105037](http://www.securityfocus.com/bid/105037)
- [http://www.securitytracker.com/id/1041483](http://www.securitytracker.com/id/1041483)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2018-8373 · Markdown: https://rewindex.com/cve/CVE-2018-8373.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-8373 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:46:04.152Z