CVE-2019-1367VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2019-1367: 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
Ransomware: Used in ransomware campaigns
EPSS: 52.4% 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-2019-1367 (opens in a new tab)

Description

CVE-2019-1367 is a memory corruption vulnerability in the scripting engine of Microsoft Internet Explorer. Exploitation of this flaw allows remote code execution with the privileges of the current user. This vulnerability has been exploited in the wild and is known to have been used in ransomware campaigns.

Summary

Microsoft Internet Explorer contains a memory corruption vulnerability (CWE-787) in its scripting engine related to how objects are handled in memory. Successful exploitation enables remote code execution in the context of the current user. The vulnerability has been observed in active exploitation scenarios, including ransomware campaigns.

Impact

An attacker who successfully exploits this vulnerability can execute arbitrary code remotely with the same privileges as the current user, potentially leading to system compromise. The vulnerability has been exploited in the wild, increasing the risk to affected systems.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor official Microsoft advisories for updates and apply any available security updates promptly.

Weaknesses

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

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:11:27 UTC

Weaknesses

References

Related threats