Security News > 2021 > September > Microsoft September 2021 Patch Tuesday fixes 2 zero-days, 60 flaws
Today is Microsoft's September 2021 Patch Tuesday, and with it comes fixes for two zero-day vulnerabilities and a total of 60 flaws.
Microsoft has fixed 60 vulnerabilities with today's update, with three classified as Critical, one as Moderate, and 56 as Important.
Soon after Microsoft disclosed the vulnerability, threat actors and security researchers began sharing guides on exploiting the vulnerability, which allowed anyone to start using it in attacks, as demonstrated below.
With the September 2021 Patch Tuesday updates, Microsoft has released a security update for this vulnerability.
September's Patch Tuesday includes fixes for two zero-day vulnerabilities, with the MSHTML bug actively exploited in the wild.
Below is the complete list of resolved vulnerabilities and released advisories in the September 2021 Patch Tuesday updates.
News URL
Related news
- Microsoft January 2025 Patch Tuesday fixes 8 zero-days, 159 flaws (source)
- Microsoft February 2025 Patch Tuesday fixes 4 zero-days, 55 flaws (source)
- Patch Tuesday: Microsoft Patches Two Actively Exploited Zero-Day Flaws (source)
- Week in review: Exploited Ivanti Connect Secure zero-day, Patch Tuesday forecast (source)
- February's Patch Tuesday sees Microsoft offer just 63 fixes (source)
- Microsoft’s Patch Tuesday Fixes 63 Flaws, Including Two Under Active Exploitation (source)
- January 2025 Patch Tuesday forecast: Changes coming in cybersecurity guidance (source)
- Microsoft fixes actively exploited Windows Hyper-V zero-day flaws (source)
- 3 Actively Exploited Zero-Day Flaws Patched in Microsoft's Latest Security Update (source)
- Patch Tuesday: January 2025 Security Update Patches Exploited Elevation of Privilege Attacks (source)