Security News > 2021 > April > Microsoft April 2021 Patch Tuesday fixes 108 flaws, 5 zero-days
Today is Microsoft's April 2021 Patch Tuesday, and with it comes five zero-day vulnerabilities and more Critical Microsoft Exchange vulnerabilities.
With today's update, Microsoft has fixed 108 vulnerabilities, with 19 classified as Critical and 89 as Important.
To make matters worse, Microsoft fixed four critical Microsoft Exchange vulnerabilities that the NSA discovered.
As part of today's Patch Tuesday, Microsoft has fixed four publicly disclosed vulnerabilities and one actively exploited vulnerability.
Microsoft Exchange admins are not getting any rest as four more Critical remote code execution vulnerabilities discovered by the NSA were fixed in Microsoft Exchange today.
Below is the full list of resolved vulnerabilities and released advisories in the April 2021 Patch Tuesday updates.
News URL
Related news
- Microsoft December 2024 Patch Tuesday fixes 1 exploited zero-day, 71 flaws (source)
- Microsoft January 2025 Patch Tuesday fixes 8 zero-days, 159 flaws (source)
- Microsoft holds last Patch Tuesday of the year with 72 gifts for admins (source)
- Patch Tuesday: Microsoft Patches One Actively Exploited Vulnerability, Among Others (source)
- What Is Patch Tuesday? Microsoft’s Monthly Update Explained (source)
- Week in review: Exploited Ivanti Connect Secure zero-day, Patch Tuesday forecast (source)
- Microsoft says premature patch could make Windows Recall forget how to work (source)
- December 2024 Patch Tuesday forecast: The secure future initiative impact (source)
- New Windows zero-day exposes NTLM credentials, gets unofficial patch (source)
- Week in review: Veeam Service Provider Console flaws fixed, Patch Tuesday forecast (source)