This security update resolves several reported vulnerabilities in Internet Explorer. The most severe of these vulnerabilities could allow remote code execution if a user views a specially crafted webpage in Internet Explorer. To learn more about these vulnerabilities, see The Security Update Guide.
This security update includes improvements and fixes that resolve the following issues:
- Addressed issue introduced by KB 4032782 where Internet Explorer may close unexpectedly when you visit some websites.
- Addressed issue in Internet Explorer 11 where a text node returned from the DOMParser may be incorrect when MutationObserver for childList and subtree is active.
- Addressed issue in Internet Explorer 11 where a crash can occur in limited scenarios when using the Find feature (Ctrl-F).
- Addressed issue where the onhashchange event fails to trigger when navigating some hashed URLs in Internet Explorer 11.
- Addressed issue where the NewWindow3 event handler is never called in a managed WebBrowser class of .NET 4.6.
- Addressed issue that can cause cursor flicker when hovering over a pop-up menu option in Internet Explorer 11 and Microsoft Edge.
- Addressed issue where Internet Explorer 11 crashes when a user clicks an empty column header and then quickly does a Shift + double click.
- Addressed issue where Internet Explorer 11 crashes with certain Browser Helper Objects after the July Internet Explorer updates.
- Addressed issue where certain elements (input or select) cannot be active targets of any action in Internet Explorer 11. This occurs after removing an iframe that contained a cursor inside certain elements (input or select) and adding a new iframe.
- Security updates to Internet Explorer.
Additionally, see the following articles for more information about this cumulative update:
- Windows 7 SP1 and Windows Server 2008 R2 SP1 update history
- Windows Server 2012 update history
- Windows 8.1 and Windows Server 2012 R2 update history
- Windows 10 and Windows Server 2016 update history
Important
- The fixes included in this Security Update for Internet Explorer 4025252 are also included in the July 2017 Security Monthly Quality Rollup. Installing either the Security Update for Internet Explorer or the Security Monthly Quality Rollup installs the fixes that are resolved in this update.
- If you use update management processes other than Windows Update and you automatically approve all security updates classifications for deployment, this Security Update for Internet Explorer 4025252, the July 2017 Security Only Quality Update, and the July 2017 Security Monthly Quality Rollup are deployed. We recommend that you review your update deployment rules to make sure the desired updates are deployed.
- This Security Update for Internet Explorer is not applicable for installation on a computer where the Security Monthly Quality Rollup or the Preview of Monthly Quality Rollup from July 2017 (or a later month) is already installed. This is because those updates contain all fixes in this Security Update for Internet Explorer.
If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.