Microsoft Scripting Engine
CVE-2019-0746 — Scripting Engine Information Disclosure Vulnerability
Executive Summary
An information disclosure vulnerability exists when the scripting engine does not properly handle objects in memory in Microsoft Edge. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system. In a web-based attack scenario, an attacker could host a website in an attempt to exploit the vulnerability. In addition, compromised websites and websites that accept or host user-provided content could contain specially crafted content that could exploit the vulnerability. However, in all cases an attacker would have no way to force a user to view the attacker-controlled content. Instead, an attacker would have to convince a user to take action. For example, an attacker could trick a user into clicking a link that takes the user to the attacker's site. The security update addresses the vulnerability by changing how the scripting engine handles objects in memory.
Overview
6.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.7
EPSS Score
0.06553
probability of exploitation in the next 30 days
0.93087 percentile - updated 2026-07-25
View on FIRST.org
Affected Products
36 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| ChakraCore | Release Notes (Security Update) |
Important | Information Disclosure | Maybe |
| Internet Explorer 10 on Windows Server 2012 4489891 (Monthly Rollup) 4489873 (IE Cumulative) Low Information Disclosure 4487025 4486474 Base: 6.4 Temporal: 5.8 Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows 10 for 32-bit Systems | 4489872 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 for x64-based Systems | 4489872 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems | 4489882 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems | 4489882 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems | 4489871 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems | 4489871 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems | 4489886 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1709 for ARM64-based Systems | 4489886 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems | 4489886 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems | 4489868 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1803 for ARM64-based Systems | 4489868 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems | 4489868 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems | 4489899 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1809 for ARM64-based Systems | 4489899 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems | 4489899 (Security Update) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 4489873 (IE Cumulative) 4489878 (Monthly Rollup) Important Information Disclosure 4486474 4486563 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 4489873 (IE Cumulative) 4489878 (Monthly Rollup) Important Information Disclosure 4486474 4486563 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows 8.1 for 32-bit systems 4489873 (IE Cumulative) 4489881 (Monthly Rollup) Important Information Disclosure 4486474 4487000 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows 8.1 for x64-based systems 4489873 (IE Cumulative) 4489881 (Monthly Rollup) Important Information Disclosure 4486474 4487000 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows RT 8.1 | 4489881 (Monthly Rollup) |
Important | Information Disclosure | Yes |
| Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4489873 (IE Cumulative) 4489878 (Monthly Rollup) Low Information Disclosure 4486474 4486563 Base: 6.4 Temporal: 5.8 Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows Server 2012 R2 4489873 (IE Cumulative) 4489881 (Monthly Rollup) Low Information Disclosure 4486474 4487000 Base: 6.4 Temporal: 5.8 Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows Server 2016 | 4489882 (Security Update) |
Low | Information Disclosure | Yes |
| Internet Explorer 11 on Windows Server 2019 | 4489899 (Security Update) |
Low | Information Disclosure | Yes |
| Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 4489873 (IE Cumulative) 4489880 (Monthly Rollup) Low Information Disclosure 4486474 4487023 Base: 6.4 Temporal: 5.8 Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2 4489873 (IE Cumulative) 4489880 (Monthly Rollup) Low Information Disclosure 4486474 4487023 Base: 6.4 Temporal: 5.8 Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems | 4489872 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems | 4489872 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems | 4489882 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems | 4489882 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems | 4489871 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems | 4489871 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems | 4489886 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for ARM64-based Systems | 4489886 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems | 4489886 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems | 4489868 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems | 4489868 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems | 4489868 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems | 4489899 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems | 4489899 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems | 4489899 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows Server 2016 | 4489882 (Security Update) |
Low | Information Disclosure | Yes |
| Microsoft Edge (EdgeHTML-based) on Windows Server 2019 | 4489899 (Security Update) |
Low | Information Disclosure | Yes |
Patches
8 patches
| Article | Type | Restart |
|---|---|---|
Release Notes |
Security Update | Maybe |
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
bo13oy
working with Trend Micro's Zero Day Initiative
References
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