Microsoft November 2026 Patch Tuesday: 1,235 flaws and an Outlook zero-day
Event Brief generated 33 s read
Written by an AI. It was merged from the 2 sources on this page and has not been reviewed by a person.
The short version
- Microsoft's November 2026 Patch Tuesday addresses 1,235 flaws, a record per BleepingComputer.
- One Microsoft Outlook zero-day is reported as actively exploited.
- Krebs on Security puts the total near 1,100 and counts 63 critical flaws.
What happened
Microsoft released its November 2026 Patch Tuesday updates. BleepingComputer reports 1,235 flaws fixed, including one actively exploited Microsoft Outlook zero-day. Krebs on Security reports almost 1,100 vulnerabilities and 63 critical flaws, and notes updates from Adobe, Apple, Google and Mozilla in the same period.
Why it might matter
Organizations that run Windows and Outlook have a large batch to triage. The exploited Outlook flaw is the first item to check against exposure and patch status.
What we don’t know yet
The two outlets give different totals (1,235 versus almost 1,100). The sources do not name the Outlook CVE or describe the exploitation.
