A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scri…

published 2018-12-12 7y ago modified 2026-06-17 4mo ago also EUVD-2018-20254

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 9.9%; EPSS 9.9% chance of exploitation in 30 days, percentile 95%
public exploits: 0; none known

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.

Patch / fix

links 1

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8643 advisory

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Exploit prediction

9.91% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	7.6	AV:N/AC:H/Au:N/C:C/I:C/A:C

Affected products

Microsoft Internet Explorer 9
Microsoft Internet Explorer 11
Microsoft Internet Explorer 10

Classification

Weakness

CWE-787 Out-of-bounds Write

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2018-8643
patch, vendor-advisory
securityfocus.com /bid/106117
vdb-entry, third-party-advisory

Sources

CVE List CVE-2018-8643
NVD CVE-2018-8643

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