CVE-2018-8373 | BDVDB-2026-105839 Detail

MicrosoftInternet Explorer 9

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-787 Out-of-bounds Write

References#

Exploit#

No public exploit known

History#

Version 12018-08-15Record published in the CVE List.
Version 22025-10-21Most recent update recorded in the CVE List.

Published

Published: 2018-08-15
Last modified: 2025-10-21

Vendor information

Vendor: Microsoft
Product: Internet Explorer 9

All Microsoft vulnerabilities

Score

7.5 High

EPSS

61.7%, High

Estimated chance of exploitation in the next 30 days. EPSS percentile: 99.2.

KEV

Yes

Listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

Apply updates per vendor instructions.

Affected Systems

Vulnerable
Windows Server 2008 for 32-bit Systems Service Pack 2
Fixed
Not stated
Vulnerable
Windows Server 2008 for x64-based Systems Service Pack 2
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.5 High

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

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Privileges Required	None
User Interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).