Security News > 2020 > December > Microsoft December 2020 Patch Tuesday fixes 58 vulnerabilities

With the December 2020 Patch Tuesday security updates release, Microsoft has released fixes for 58 vulnerabilities and one advisory for Microsoft products.
Of the 58 vulnerabilities fixed today, nine are classified as Critical, 48 as Important, and two as Moderate.
There are no zero-day or previously disclosed vulnerabilities fixed in the December 2020 updates.
Included in today's Patch Tuesday updates is an advisory for a DNS cache poisoning vulnerability discovered by security researchers from Tsinghua University and the University of California.
Below is the full list of resolved vulnerabilities and released advisories in the December 2020 Patch Tuesday updates.
News URL
Related news
- Patch Tuesday: Microsoft Fixes 134 Vulnerabilities, Including 1 Zero-Day (source)
- Microsoft March 2025 Patch Tuesday fixes 7 zero-days, 57 flaws (source)
- Patch Tuesday: Microsoft Fixes 57 Security Flaws – Including Active Zero-Days (source)
- April 2025 Patch Tuesday forecast: More AI security introduced by Microsoft (source)
- Microsoft April 2025 Patch Tuesday fixes exploited zero-day, 134 flaws (source)
- March 2025 Patch Tuesday forecast: A return to normalcy (source)
- Choose your own Patch Tuesday adventure: Start with six zero day fixes, or six critical flaws (source)
- Still Using an Older Version of iOS or iPadOS? Update Now to Patch These Critical Security Vulnerabilities (source)
- Week in review: Probing activity on Palo Alto Networks GlobalProtect portals, Patch Tuesday forecast (source)
- Google Releases Android Update to Patch Two Actively Exploited Vulnerabilities (source)