The Microsoft February 2021 security updates have been released and consist of 56 CVEs. Of these 56 CVEs, 11 are rated Critical, 43 are rated Important, and two are rated Moderate in severity. One bug (CVE-2021-1732) is known to be actively exploited and six other bugs are listed as being publicly known at the time of release.
The updates apply to the following products: Microsoft Windows components, .NET Framework, Azure IoT, Azure
Kubernetes Service, Microsoft Edge for Android, Exchange Server, Office
and Office Services and Web Apps, Skype for Business and Lync, and
Windows Defender.
If you are using Windows Update, the latest SSU will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog. For information about Servicing Stack updates see Servicing Stack Updates (SSU).
The KBs listed below contain information about known issues with the security updates.
KB Article
|
Applies To
|
4493194
|
SharePoint Server
2019
|
4493195
|
SharePoint
Enterprise Server 2016
|
4493210
|
SharePoint
Foundation 2013
|
4493223
|
SharePoint
Foundation 2010
|
4571787
|
Exchange Server 2019
|
4600944
|
Security and Quality
Rollup for .NET Framework 4.8 for Windows 7 SP1 and Windows Server 2008 R2
SP1
|
4600945
|
Security and Quality
Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 7
SP1 and Windows Server 2008 R2 SP1 and Windows Server 2008 SP2
|
4600957
|
Security and Quality
Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows
Server 2012
|
4601048
|
Security and Quality
Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows
8.1, RT 8.1, and Windows Server 2012 R2
|
4601050
|
Cumulative Update
for .NET Framework 3.5 and 4.8 for Windows 10, version 2004, Windows Server,
version 2004, Windows 10, version 20H2, and Windows Server, version 20H2
|
4601051
|
Cumulative Update
for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server,
version 2016
|
4601052
|
Cumulative Update
for .NET Framework 4.8 for Windows 10 Version 1703
|
4601054
|
Cumulative Update
for .NET Framework 4.8 for Windows 10 Version 1803
|
4601055
|
Cumulative Update
for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows
Server, version 2019
|
4601056
|
Cumulative Update
for .NET Framework 3.5 and 4.8 for Windows 10, version 1909, and Windows
Server, version 1909
|
4601057
|
Security and Quality
Rollup for .NET Framework 4.8 for Windows Server 2012
|
4601058
|
Security and Quality
Rollup for .NET Framework 4.8 for Windows 8.1, RT 8.1, and Windows Server
2012 R2
|
4601060
|
Cumulative Update
for .NET Framework 3.5 and 4.7.2 for Windows 10, version 1809 and Windows
Server, version 2019
|
4601315
|
Windows 10, Version
1909, Windows Server, Version 1909
|
4601318
|
Windows 10, Version
1607, Windows Server 2016
|
4601319
|
Windows 10, version
2004
|
4601345
|
Windows 10, Version
1809, Windows Server 2019
|
4601347
|
Windows 7, Windows
Server 2008 R2 (Monthly Rollup)
|
4601348
|
Windows Server 2012
(Monthly Rollup)
|
4601349
|
Windows 8.1, Windows
RT 8.1, Windows Server 2012 R2 (Security-only update)
|
4601357
|
Windows Server 2012
(Security-only update)
|
4601360
|
Windows Server 2008
(Monthly Rollup)
|
4601363
|
Windows 7, Windows
Server 2008 R2 (Security-only update)
|
4601366
|
Windows Server 2008
(Security-only update)
|
4601384
|
Windows 8.1, Windows
RT 8.1, Windows Server 2012 R2 (Monthly Rollup)
|
4601887
|
Cumulative Update
for .NET Framework 3.5, 4.7.2 and 4.8 for Windows 10, version 1809 and
Windows Server, version 2019
|
4602269
|
Exchange Server
2019, Exchange Server 2016
|
4603002
|
Security and Quality
Rollup for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2,
4.8 for Windows 7 SP1 and Windows Server 2008 R2 SP1
|
4603003
|
Security and Quality
Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2,
4.8 for Windows Server 2012
|
4603004
|
Security and Quality
Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2,
4.8 for Windows 8.1, RT 8.1, and Windows Server 2012 R2
|
4603005
|
Security and Quality
Rollup for .NET Framework 2.0, 3.0, 4.5.2, 4.6 for Windows Server 2008 SP2
|
Recommended Reading:
See Dustin Childs review and analysis in Zero Day Initiative -- The February 2021 Security Update Review.
For more information about the updates released today, see the Security Update Guide.
REMINDER: Adobe Flash Player is out of support. For more information, see Adobe Flash end of support on December 31, 2020. Flash content is blocked from running in Flash Player today, January 12, 2021. For more information, see Adobe Flash Player EOL General Information Page.
Additional Update Notes:
- MSRT -- The Malicious Software Removal Tool is now run on a quarterly basis rather than monthly. See Remove specific prevalent malware with Windows Malicious Software Removal Tool.
- Servicing Stack Updates -- A list of the latest servicing stack updates for each operating system can be found in ADV990001. This list will be updated whenever a new servicing stack update is released. It is important to install the latest servicing stack update. Learn more about SSU's in Servicing Stack Updates (SSU)
- Windows 10 updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows 10, in addition to non-security updates. The updates are also available via the Microsoft Update Catalog.
- For information on lifecycle and support dates for Windows 10 operating systems, please see Windows Lifecycle Facts Sheet.
- Windows Update History:
References
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