Critical CVSS 7.5 EPSS 0.12906 2019-10 archive

Executive Summary

A remote code execution vulnerability exists when the Microsoft XML Core Services MSXML parser processes user input. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the user’s system. To exploit the vulnerability, an attacker could host a specially crafted website designed to invoke MSXML through a web browser. However, an attacker would have no way to force a user to visit such a website. Instead, an attacker would typically have to convince a user to either click a link in an email message or instant message that would then take the user to the website. When Internet Explorer parses the XML content, an attacker could run malicious code remotely to take control of the user’s system. The update addresses the vulnerability by correcting how the MSXML parser processes user input.

Overview

7.5
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Remote Code Execution
Released Oct 8 2019
Last Updated Oct 8 2019
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.12906 — 0.95803 percentile

CVSS Vector

ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
Temporal Score: 6.7

EPSS Score

0.12906
probability of exploitation in the next 30 days
0.95803 percentile - updated 2026-06-20
View on FIRST.org

Affected Products

31 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 4520011 (Security Update) Critical Remote Code Execution Yes
Windows 10 for x64-based Systems 4520011 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1607 for 32-bit Systems 4519998 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1607 for x64-based Systems 4519998 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1703 for 32-bit Systems 4520010 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1703 for x64-based Systems 4520010 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1709 for 32-bit Systems 4520004 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1709 for ARM64-based Systems 4520004 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1709 for x64-based Systems 4520004 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1803 for 32-bit Systems 4520008 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1803 for ARM64-based Systems 4520008 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1803 for x64-based Systems 4520008 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1809 for 32-bit Systems 4519338 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1809 for ARM64-based Systems 4519338 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1809 for x64-based Systems 4519338 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1903 for 32-bit Systems 4517389 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1903 for ARM64-based Systems 4517389 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1903 for x64-based Systems 4517389 (Security Update) Critical Remote Code Execution Yes
Windows 8.1 for 32-bit systems 4520005 (Monthly Rollup) 4519990 (Security Only) Critical Remote Code Execution Yes
Windows 8.1 for x64-based systems 4520005 (Monthly Rollup) 4519990 (Security Only) Critical Remote Code Execution Yes
Windows RT 8.1 4520005 (Monthly Rollup) Critical Remote Code Execution Yes
Windows Server 2012 4520007 (Monthly Rollup) 4519985 (Security Only) Critical Remote Code Execution Yes
Windows Server 2012 (Server Core installation) 4520007 (Monthly Rollup) 4519985 (Security Only) Critical Remote Code Execution Yes
Windows Server 2012 R2 4520005 (Monthly Rollup) 4519990 (Security Only) Critical Remote Code Execution Yes
Windows Server 2012 R2 (Server Core installation) 4520005 (Monthly Rollup) 4519990 (Security Only) Critical Remote Code Execution Yes
Windows Server 2016 4519998 (Security Update) Critical Remote Code Execution Yes
Windows Server 2016 (Server Core installation) 4519998 (Security Update) Critical Remote Code Execution Yes
Windows Server 2019 4519338 (Security Update) Critical Remote Code Execution Yes
Windows Server 2019 (Server Core installation) 4519338 (Security Update) Critical Remote Code Execution Yes
Windows Server, version 1803 (Server Core Installation) 4520008 (Security Update) Critical Remote Code Execution Yes
Windows Server, version 1903 (Server Core installation) 4517389 (Security Update) Critical Remote Code Execution Yes

Patches

10 patches
Article Type Restart
4520011 Security Update Yes
4519998 Security Update Yes
4520010 Security Update Yes
4520004 Security Update Yes
4520008 Security Update Yes
4519338 Security Update Yes
4517389 Security Update Yes
4520005 (Monthly Rollup) 4519990 Monthly Rollup Yes
4520005 Monthly Rollup Yes
4520007 (Monthly Rollup) 4519985 Monthly Rollup Yes

Known Exploits

Acknowledgments