CVE-2019-0761 — Internet Explorer Security Feature Bypass Vulnerability

Executive Summary

A security feature bypass vulnerability exists when Internet Explorer fails to validate the correct Security Zone of requests for specific URLs. This could allow an attacker to cause a user to access a URL in a less restricted Internet Security Zone than intended. To exploit this vulnerability, an attacker could email or otherwise provide a specially crafted URL to a victim and convince them to click on it. The security update addresses the vulnerability by correcting security feature behavior to properly map affected URLs to the correct Security Zone.

Overview

6.5

CVSS MEDIUM

Low

MS Severity

Not Exploited

MS Exploit Status

Less 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 0.03854 — 0.89049 percentile

NVD CVSS 6.5 MEDIUM — differs from MSRC

CVSS Vector

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

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

EPSS Score

0.03854

probability of exploitation in the next 30 days

0.89049 percentile - updated 2026-07-25

View on FIRST.org

Affected Products

18 affected products

Product	KB Article	Severity	Impact	Restart Required
Internet Explorer 10 on Windows Server 2012 4489891 (Monthly Rollup) 4489873 (IE Cumulative) Low Security Feature Bypass 4487025 4486474 Base: N/A Temporal: N/A Vector: N/A Yes None Internet Explorer 11 on Windows 10 for 32-bit Systems	`4489872 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 for x64-based Systems	`4489872 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems	`4489882 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems	`4489882 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems	`4489871 (Security Update)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems	`4489871 (Security Update)`	Important	Security Feature Bypass	Yes
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 7 for 32-bit Systems Service Pack 1 4489873 (IE Cumulative) 4489878 (Monthly Rollup) Important Security Feature Bypass 4486474 4486563 Base: N/A Temporal: N/A Vector: N/A Yes None Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 4489873 (IE Cumulative) 4489878 (Monthly Rollup) Important Security Feature Bypass 4486474 4486563 Base: N/A Temporal: N/A Vector: N/A Yes None Internet Explorer 11 on Windows 8.1 for 32-bit systems 4489873 (IE Cumulative) 4489881 (Monthly Rollup) Important Security Feature Bypass 4486474 4487000 Base: N/A Temporal: N/A Vector: N/A Yes None Internet Explorer 11 on Windows 8.1 for x64-based systems 4489873 (IE Cumulative) 4489881 (Monthly Rollup) Important Security Feature Bypass 4486474 4487000 Base: N/A Temporal: N/A Vector: N/A Yes None Internet Explorer 11 on Windows RT 8.1	`4489881 (Monthly Rollup)`	Important	Security Feature Bypass	Yes
Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4489873 (IE Cumulative) 4489878 (Monthly Rollup) Low Security Feature Bypass 4486474 4486563 Base: N/A Temporal: N/A Vector: N/A Yes None Internet Explorer 11 on Windows Server 2012 R2 4489873 (IE Cumulative) 4489881 (Monthly Rollup) Low Security Feature Bypass 4486474 4487000 Base: N/A Temporal: N/A Vector: N/A Yes None Internet Explorer 11 on Windows Server 2016	`4489882 (Security Update)`	Low	Security Feature Bypass	Yes
Internet Explorer 11 on Windows Server 2019	`4489899 (Security Update)`	Low	Security Feature Bypass	Yes

Patches

7 patches

Article	Type	Restart
`4489872`	Security Update	Yes
`4489882`	Security Update	Yes
`4489871`	Security Update	Yes
`4489886`	Security Update	Yes
`4489868`	Security Update	Yes
`4489899`	Security Update	Yes
`4489881`	Monthly Rollup	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

None

References

MSRC Advisory MITRE NVD