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Microsoft Security Updates for October, 2017

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The October security release consists of 62 security updates for the following software in which 27 are listed as Critical and 35 are rated Important. In particular, note that one CVE in Microsoft Office is listed as under active attack, and two other CVEs are listed as publically known prior to release.

  • Internet Explorer
  • Microsoft Edge
  • Microsoft Windows
  • Microsoft Office and Microsoft Office Services and Web Apps
  • Skype for Business and Lync
  • Chakra Core

Known Issues

The updates address Remote Code Execution, Information Disclosure, "Defense in Depth",Security Feature Bypass and Elevation of Privilege. Note: "Defense-in-Depth" is a fix that does not apply to an actively exploitable vulnerability but prevents future vulnerabilities caused by the same code when surrounding code changes expose the problem.


For more information about the updates released today, see https://portal.msrc.microsoft.com/en-us/security-guidance/summary. Updates can be sorted by OS from the search box. Information about the update for Windows 10 is available at Windows 10 Update history.


CVEs addressed by Microsoft this month that deserve extra attention are discussed in Zero Day Initiative — The October 2017 Security Update Review by Dustin Childs.


Release Notes

Windows 10 Update History

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