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CVE-2018-8373

HIGH
7.5
CVSS Score
Published: August 15, 2018 at 05:00 PM UTC
Updated: June 17, 2026 at 02:04 AM UTC
12 products affected across 1 vendorInternet ExplorerWindows Server 2016Windows Server 2012

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Severity
HIGH7.5
Exploitation
CISA KEV
Exploit prediction
EPSS 62%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score61.5%

EPSS (Exploit Prediction Scoring System) estimates a 61.5% chance this CVE is exploited in the wild within the next 30 days — higher than 99% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Mar 25, 2022
Remediation Due
Apr 15, 2022
1656 days overdue
Notes
https://nvd.nist.gov/vuln/detail/CVE-2018-8373

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Internet Explorer· Microsoft
95%
10119Windows 10 Version 1607 for 32-bit SystemsWindows 10 Version 1607 for x64-based SystemsWindows 10 Version 1703 for 32-bit SystemsWindows 10 Version 1703 for x64-based SystemsWindows 10 Version 1709 for 32-bit SystemsWindows 10 Version 1709 for x64-based SystemsWindows 10 Version 1803 for 32-bit SystemsWindows 10 Version 1803 for x64-based SystemsWindows 10 for 32-bit SystemsWindows 10 for x64-based SystemsWindows 7 for 32-bit Systems Service Pack 1Windows 7 for x64-based Systems Service Pack 1Windows 8.1 for 32-bit systemsWindows 8.1 for x64-based systemsWindows RT 8.1Windows Server 2008 R2 for x64-based Systems Service Pack 1Windows Server 2008 for 32-bit Systems Service Pack 2Windows Server 2008 for x64-based Systems Service Pack 2Windows Server 2012Windows Server 2012 R2Windows Server 2016
microsoft-windows-10-1507 (environment) · microsoft-windows-10-1607 (environment) · microsoft-windows-10-1703 (environment) · microsoft-windows-10-1709 (environment) · microsoft-windows-10-1803 (environment) · microsoft-windows-7 (environment) · microsoft-windows-8-1 (environment) · microsoft-windows-rt-8-1 (environment) · microsoft-windows-server-2008 (environment) · microsoft-windows-server-2012 (environment) · microsoft-windows-server-2016 (environment)
Windows 10 1507· Microsoftdevice
80%
All versions
Windows 10 1607· Microsoftdevice
80%
All versions
Windows 10 1703· Microsoftdevice
80%
All versions
Windows 10 1709· Microsoftdevice
80%
All versions
Windows 10 1803· Microsoftdevice
80%
All versions
Windows 7· Microsoftdevice
80%
All versions
Windows 8-1· Microsoftdevice
80%
All versions
Windows Rt 8-1· Microsoftdevice
80%
All versions
Windows Server 2008· Microsoftdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

VDB Entryx_refsource_BIDBroken LinkThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/105037
VDB Entryx_refsource_SECTRACKBroken LinkThird Party Advisory
Source: [email protected]
http://www.securitytracker.com/id/1041483
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8373
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8373

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-787

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