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CVE-2018-8242

33
FAUCET Score

CVE-2018-8242 is a critical remote code execution vulnerability in Internet Explorer's scripting engine, affecting versions 9, 10, and 11, as well as various Windows operating systems. This memory corruption flaw allows an attacker to execute arbitrary code. With a CVSS score of 7.5 (High), exploitation requires user interaction (UI:R) but can lead to high confidentiality, integrity, and availability impacts (C:H/I:H/A:H) if successful. While no public exploit code (Metasploit, Nuclei, ExploitDB) is currently available, the vulnerability has garnered significant community discussion and media coverage, indicating its potential for future exploitation. It is not listed in CISA's KEV catalog, but its high EPSS and FAUCET Risk Score suggest a high likelihood of exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
10CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:10:*:*:*:*:*:*:*
11CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:11:*:*:*:*:*:*:*
9CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
17.98%
Probability of exploitation in next 30 days
EPSS Percentile
96.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1798 is in the 88th percentile among its peer group of 1,572 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.4 Bluesky, 0.2 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.6 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (43)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 10555-10378
View patch
microsoftpatch availablevia msrc
Product: 10336-9312
View patch
microsoftpatch availablevia msrc
Product: 10336-9318
View patch
microsoftpatch availablevia msrc
Product: 10486-10951
View patch
microsoftpatch availablevia msrc
Product: 10486-10952
View patch
microsoftpatch availablevia msrc
Product: 10486-11497
View patch
microsoftpatch availablevia msrc
Product: 10486-11498
View patch
microsoftpatch availablevia msrc
Product: 10486-11453
View patch
microsoftpatch availablevia msrc
Product: 10486-11454
View patch
microsoftpatch availablevia msrc
Product: 10486-10729
View patch
microsoftpatch availablevia msrc
Product: 10486-10735
View patch
microsoftpatch availablevia msrc
Product: 10486-10852
View patch
microsoftpatch availablevia msrc
Product: 10486-10853
View patch
microsoftpatch availablevia msrc
Product: 10486-10816
View patch
microsoftpatch availablevia msrc
Product: 10486-10047
View patch
microsoftpatch availablevia msrc
Product: 10486-10048
View patch
microsoftpatch availablevia msrc
Product: 10486-10051
View patch
microsoftpatch availablevia msrc
Product: 10486-10481
View patch
microsoftpatch availablevia msrc
Product: 10486-10482
View patch
microsoftpatch availablevia msrc
Product: 10486-10484
View patch
microsoftpatch availablevia msrc
Product: 10486-10483
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 10 on Windows Server 2012
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 10 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 10 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows Server 2016
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 8.1 for 32-bit systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows 8.1 for x64-based systems
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows RT 8.1
View patch
microsoftpatch availablevia msrc
Product: Internet Explorer 11 on Windows Server 2012 R2
View patch

Vendor Advisories (1)

microsoft2018-Jul/CVE-2018-8242Moderate

Scripting Engine Memory Corruption Vulnerability

Jul 10, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8242
PatchVendor Advisory
securityfocus.com / bid/104620
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041258
Third Party AdvisoryVDB Entry