CVE-2018-8373

ENISA EUVD: EUVD-2018-20017 ↗
Exploited in the Wild ✓ Confirmed 0-Day ★ Google Project Zero
Triaged: March 5, 2026 4 articles Published: 2018-08-15
VulnLookup ↗ NVD ↗ EUVD ↗ MITRE ↗ Advisory ↗ P0 Sheet ↗ CISA KEV ↗

EPSS Score

Source: FIRST.org · 2026-05-23
82.49%
probability
This CVE has a 82.49% probability of being exploited in the next 30 days.
0% Top 99.2th percentile of all CVEs 100%

CVSS v3.1

Source: VulnerabilityLookup (CIRCL)
7.5
HIGH
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2 (legacy)

7.6
HIGH
Access Vector
Network
Access Complexity
High
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
AV:N/AC:H/Au:N/C:C/I:C/A:C

Description

VulnerabilityLookup (CNA)
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.

Affected Products

Microsoft
Internet Explorer 9
Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems Service Pack 2
Microsoft
Internet Explorer 11
Windows 10 for 32-bit Systems Windows 10 for x64-based Systems Windows 10 Version 1607 for 32-bit Systems Windows 10 Version 1607 for x64-based Systems Windows 10 Version 1703 for 32-bit Systems Windows 10 Version 1703 for x64-based Systems
Microsoft
Internet Explorer 10
Windows Server 2012

Attack Intelligence

Google Project Zero

Discovered
July 11, 2018
Patched
Aug. 14, 2018
Reported by
Elliot Cao of Trend Micro Security Research working with Trend Micro’s Zero Day Initiative (ZDI)
Root Cause Analysis
???

Signal Intelligence

Confidenceⓘ
95%
EPSS 82.49%
CVSS v3.1 7.5
Mentions 4
Last Seen Aug 18, 2018

CNA Information

CNA Assigner
microsoft

Analyst Note

Auto-imported from Google Project Zero — confirmed zero-day by definition.

Triage Info

Decided atMar 05, 2026
Published DateAug 15, 2018