Microsoft October 2026 Security Updates

 

The Microsoft October 2026 security updates have been released and consist of 1,413 updates. The reason the number of updates is so large is explained by Microsoft here:  Using risk cohorts to prioritize security updates.

At the time of release, two updates are listed as publicly known. As indicated in Dustin Childs blog, linked below, 59 of the October CVEs fit his definition of wormable.

The security updates apply to the following products, features and roles: Windows and Windows components, Office and Office Components, Developer Tools and .NET, SharePoint, Linux kernel, Skype for Business and Microsoft Lync, SQL Server and Dynamics, Azure and cloud services, and Exchange server.

Information regarding known issues with KBs included in the security updates can be found at the bottom of the page at October 2026 Security Updates - Release Notes - Security Update Guide - Microsoft.

Recommended Reading:  See Dustin Childs complete review and analysis in Zero Day Initiative -- The October 2026 Security Update Review.

Additional Update Notes:

• Windows 10 -- See Windows 10 Extended Security Updates (ESU).
• Servicing Stack Updates -- Microsoft now combines the latest servicing stack update (SSU) for your operating system with the Latest Cumulative Updates (LCU). For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.
  
• Windows updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows, in addition to non-security updates. The updates are also available via search for the KB number in the Microsoft Update Catalog.
• For information on lifecycle and support dates for Windows 11 operating systems, please see Windows 11 Home and Pro.
• Windows Update History:  Windows 11, Windows 10

 

References

• Security Update FAQ
• Security Updates Guide

Remember - "A day without laughter is a day wasted."
May the wind sing to you and the sun rise in your heart...

Mozilla Firefox Version 158.0 Released with Security Updates

 

Mozilla sent Firefox Version 158.0 to the release channel. 

The update includes 77 security updates in which 30 are rated critical, 33 rated moderate and 14 rated low. The security updates can be reviewed here.  

Note:  The number of security updates is due to Mozilla no longer rolling all internally identified memory safety vulnerabilities into a single CVE.  Instead, they are now issuing an advisory for every individual bug.

The update also includes five new features, one change and four fixes. To review the new features, changes and fixes, see the Release Notes.

Update:  To get the update now, select "Help" from the Firefox menu and pick "About Firefox".  Mac users need to select "About Firefox" from the Firefox menu.  If you do not use the English language version, Fully Localized Versions are available for download.

Rapid Release Calendar

Remember - "A day without laughter is a day wasted."
May the wind sing to you and the sun rise in your heart...

Mozilla Firefox Version 157.0 Released with Security Updates

 

Mozilla sent Firefox Version 157.0 to the release channel. 

The update includes 73 security updates in which 38 are rated critical, 29 rated moderate and 6 rated low. The security updates can be reviewed here.  

Note:  The number of security updates is due to Mozilla no longer rolling all internally identified memory safety vulnerabilities into a single CVE.  Instead, they are now issuing an advisory for every individual bug.

The update also includes one new feature, four changes and five fixes. To review the new features, changes and fixes, see the Release Notes.

Update:  To get the update now, select "Help" from the Firefox menu and pick "About Firefox".  Mac users need to select "About Firefox" from the Firefox menu.  If you do not use the English language version, Fully Localized Versions are available for download.

Rapid Release Calendar

Remember - "A day without laughter is a day wasted."
May the wind sing to you and the sun rise in your heart...