CVE-2018-8653VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2018-8653: Microsoft Internet Explorer Scripting Engine Memory Corruption Vulnerability

Affects Microsoft Internet ExplorerSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 05/03/2022
EPSS: 29.6% chance of exploitation in 30 days – higher than 98% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2018-8653 (opens in a new tab)

Description

CVE-2018-8653 is a memory corruption vulnerability in the Microsoft Internet Explorer scripting engine. It arises from improper handling of objects in memory, which can lead to remote code execution. This vulnerability has been exploited in the wild, posing a significant risk to affected systems.

Summary

Microsoft Internet Explorer contains a memory corruption vulnerability (CVE-2018-8653) due to how its scripting engine handles objects in memory. This flaw allows attackers to execute arbitrary code remotely by exploiting the memory corruption. The vulnerability has been observed in active exploitation campaigns.

Impact

Successful exploitation of this vulnerability allows remote attackers to execute arbitrary code on affected systems, potentially leading to full system compromise. Given that it has been exploited in the wild, the risk to users running vulnerable versions of Internet Explorer is high.

Mitigation

No explicit patch or remediation details are provided in the input data. Patch status is not yet confirmed — check the Microsoft vendor advisory for current remediation guidance. Users should apply any available security updates from Microsoft for Internet Explorer promptly.

Weaknesses

CWE-787Out-of-bounds Write (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:11:53 UTC

Weaknesses

References

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