CVE-2019-0768 — Internet Explorer Security Feature Bypass Vulnerability

Executive Summary

A security feature bypass vulnerability exists when Internet Explorer VBScript execution policy does not properly restrict VBScript under specific conditions, and to allow requests that should otherwise be ignored. An attacker who successfully exploited the vulnerability could force the browser to send data that would otherwise be restricted. In a web-based attack scenario, an attacker could host a website in an attempt to exploit this vulnerability. In addition, compromised websites and websites that accept or host user-provided content could contain specially crafted content that could exploit the vulnerability. The update addresses the vulnerability by fixing how the Internet Explorer VBScript execution policy validates embedded VBScript content.

Overview

4.3

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

More Likely

MS Exploit Likelihood

Category Security Feature Bypass

Released Mar 12 2019

Last Updated Mar 12 2019

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.48501 — 0.98717 percentile

CVSS Vector

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

Temporal Score: 3.9

EPSS Score

0.48501

probability of exploitation in the next 30 days

0.98717 percentile - updated 2026-06-20

View on FIRST.org

Affected Products

10 affected products

Product	KB Article	Severity	Impact	Restart Required
Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems	`4489886 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1709 for ARM64-based Systems	`4489886 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems	`4489886 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems	`4489868 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1803 for ARM64-based Systems	`4489868 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems	`4489868 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems	`4489899 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1809 for ARM64-based Systems	`4489899 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems	`4489899 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows Server 2019	`4489899 (Security Update)`	Low	Security Feature Bypass	Yes

Patches

3 patches

Article	Type	Restart
`4489886`	Security Update	Yes
`4489868`	Security Update	Yes
`4489899`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Google Project Zero

References

MSRC Advisory MITRE NVD