CVE-2019-1043: Microsoft Windows 10

Medium severity, CVSS 6.4. EPSS: 3% chance of exploitation in the next 30 days.

A remote code execution vulnerability exists in the way that comctl32.dll handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, the attacker could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. An attacker could host a specially crafted website designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website. The attacker could also take advantage of compromised websites, or websites that accept or host user-provided content or advertisements, by adding 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, typically by an enticement in an email or instant message, or by getting the user to open an attachment sent through email. The security update addresses the vulnerability by modifying how comctl32.dll handles objects in memory.

Affected products

  • Microsoft Windows 10: affected versions not specified; version 1607 only; version 1703 only; version 1709 only; version 1803 only; version 1809 only; …
  • Microsoft Windows 7: affected versions not specified
  • Microsoft Windows 8.1: affected versions not specified
  • Microsoft Windows Rt 8.1: affected versions not specified
  • Microsoft Windows Server 2008: affected versions not specified; version r2 only
  • Microsoft Windows Server 2012: affected versions not specified; version r2 only
  • Microsoft Windows Server 2016: affected versions not specified; version 1803 only; version 1903 only
  • Microsoft Windows Server 2019: affected versions not specified

Published 2019-06-12. Last modified 2026-06-17.