The following software versions or editions are affected.
Versions or editions that are not listed are either past their support life cycle or are not affected.

To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.The severity ratings indicated for each affected software assume the potential maximum impact of the vulnerability.

For information regarding the likelihood, within 30 days of this security bulletin’s release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the December bulletin summary.Note: Please see the Security Update Guide for a new approach to consuming the security update information. You can customize your views and create affected software spreadsheets, as well as download data via a restful API.

For more information, please see the Security Updates Guide FAQ.

As a reminder, the Security Updates Guide will be replacing security bulletins as of February 2017. Please see our blog post, Furthering our commitment to security updates, for more details.[1]Beginning with the October 2016 release, Microsoft has changed the update servicing model for Microsoft .NET Framework.

For more information, please see this Microsoft .NET Blog Post.[2]This number is the Parent package KB number. Users will be offered the Parent KB; however, the package KB numbers listed for each platform will be displayed in Add Remove Programs.[3]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 available via the Microsoft Update Catalog. Please note that effective December 13, 2016, Windows 10 and Windows Server 2016 details for the Cumulative Updates will be documented in Release Notes. Please refer to the Release Notes for OS Build numbers, Known Issues, and affected file list information.Note The vulnerability discussed in this bulletin affects Windows Server 2016 Technical Preview 5.

Although an update is available for Windows Server 2016 Technical Preview 5 via Windows Update, Microsoft recommends that customers upgrade to Window Server 2016 at your earliest convenience.
Operating System

Component                                                            

.NET Information Disclosure Vulnerability – CVE-2016-7270

Updates Replaced         

Windows Vista and Windows Server 2008Microsoft .NET Framework Updates for 2.0, 4.5.2, 4.6 (KB3210142) [2]

Windows Vista

Windows Vista for 32-bit Systems Service Pack 2

Microsoft .NET Framework 2.0 Service Pack 2(3210129)

Not applicable[4]

3188744 in MS16-120
3163244 in MS16-091

Windows Vista for x64-based Systems Service Pack 2

Microsoft .NET Framework 2.0 Service Pack 2(3210129)

Not applicable[4]

3188744 in MS16-120
3163244 in MS16-091

Windows Vista for 32-bit Systems Service Pack 2

Microsoft .NET Framework 4.5.2(3210139)

Not applicable[4]

3188744 in MS16-120

Windows Vista for x64-based Systems Service Pack 2

Microsoft .NET Framework 4.5.2(3210139)

Not applicable[4]

3188744 in MS16-120

Windows Vista for 32-bit Systems Service Pack 2

Microsoft .NET Framework 4.6(3210136)

Not applicable[4]

3188744 in MS16-120

Windows Vista for x64-based Systems Service Pack 2

Microsoft .NET Framework 4.6(3210136)

Not applicable[4]

3188744 in MS16-120

Windows Server 2008

Windows Server 2008 for 32-bit Systems Service Pack 2

Microsoft .NET Framework 2.0 Service Pack 2(3210129)

Not applicable[4]

3188744 in MS16-120
3163244 in MS16-091

Windows Server 2008 for x64-based Systems Service Pack 2

Microsoft .NET Framework 2.0 Service Pack 2(3210129)

Not applicable[4]

3188744 in MS16-120
3163244 in MS16-091

Windows Server 2008 for Itanium-based Systems Service Pack 2

Microsoft .NET Framework 2.0 Service Pack 2(3210129)

Not applicable[4]

3188744 in MS16-120
3163244 in MS16-091

Windows Server 2008 for 32-bit Systems Service Pack 2

Microsoft .NET Framework 4.5.2(3210139)

Not applicable[4]

3188744 in MS16-120

Windows Server 2008 for x64-based Systems Service Pack 2

Microsoft .NET Framework 4.5.2(3210139)

Not applicable[4]

3188744 in MS16-120

Windows Server 2008 for 32-bit Systems Service Pack 2

Microsoft .NET Framework 4.6(3210136)

Not applicable[4]

3188744 in MS16-120

Windows Server 2008 for x64-based Systems Service Pack 2

Microsoft .NET Framework 4.6(3210136)

Not applicable[4]

3188744 in MS16-120

Windows 7 and Windows Server 2008 R2Microsoft .NET Framework Updates for 3.5.1, 4.5.2, 4.6,4.6.1, 4.6.2 (KB3205402) [2]

Windows 7

Windows 7 for 32-bit Systems Service Pack 1

Microsoft .NET Framework 3.5.1(3210131)

Not applicable[4]

None

Windows 7 for x64-based Systems Service Pack 1

Microsoft .NET Framework 3.5.1(3210131)

Not applicable[4]

None

Windows 7 for 32-bit Systems Service Pack 1

Microsoft .NET Framework 4.5.2(3210139)

Not applicable[4]

All previously released updates[4]

Windows 7 for x64-based Systems Service Pack 1

Microsoft .NET Framework 4.5.2(3210139)

Not applicable[4]

All previously released updates[4]

Windows 7 for 32-bit Systems Service Pack 1

Microsoft .NET Framework 4.6/4.6.1(3210136)

Not applicable[4]

All previously released updates[4]

Windows 7 for x64-based Systems Service Pack 1

Microsoft .NET Framework 4.6/4.6.1(3210136)

Not applicable[4]

All previously released updates[4]

Windows 7 for 32-bit Systems Service Pack 1

Microsoft .NET Framework 4.6.2(3205379)

ImportantInformation Disclosure

None

Windows 7 for x64-based Systems Service Pack 1

Microsoft .NET Framework 4.6.2(3205379)

ImportantInformation Disclosure

None

Windows Server 2008 R2

Windows Server 2008 R2 for x64-based Systems Service Pack 1

Microsoft .NET Framework 3.5.1(3210131)

Not applicable[4]

None

Windows Server 2008 R2 for Itanium-based Systems Service Pack 1

Microsoft .NET Framework 3.5.1(3210131)

Not applicable[4]

None

Windows Server 2008 R2 for x64-based Systems Service Pack 1

Microsoft .NET Framework 4.5.2(3210139)

Not applicable[4]

All previously released updates[4]

Windows Server 2008 R2 for x64-based Systems Service Pack 1

Microsoft .NET Framework 4.6/4.6.1(3210136)

Not applicable[4]

All previously released updates[4]

Windows Server 2008 R2 for x64-based Systems Service Pack 1

Microsoft .NET Framework 4.6.2(3205379)

ImportantInformation Disclosure

None

Windows Server 2012Microsoft .NET Framework Updates for 3.5, 4.5.2, 4.6,4.6.1, 4.6.2 (KB3205403) [2]

Windows Server 2012

Microsoft .NET Framework 3.5(3210130)

Not applicable[4]

None

Windows Server 2012

Microsoft .NET Framework 4.5.2(3210138)

Not applicable[4]

All previously released updates[4]

Windows Server 2012

Microsoft .NET Framework 4.6/4.6.1(3210133)

Not applicable[4]

All previously released updates[4]

Windows Server 2012

Microsoft .NET Framework 4.6.2(3205377)

ImportantInformation Disclosure

None

Windows 8.1 and Windows Server 2012 R2Microsoft .NET Framework Updates for 3.5, 4.5.2, 4.6,4.6.1, 4.6.2 (KB3205404) [2]

Windows 8.1

Windows 8.1 for 32-bit Systems

Microsoft .NET Framework 3.5(3210132)

Not applicable[4]

None

Windows 8.1 for x64-based Systems

Microsoft .NET Framework 3.5(3210132)

Not applicable[4]

None

Windows 8.1 for 32-bit Systems

Microsoft .NET Framework 4.5.2(3210137)

Not applicable[4]

All previously released updates[4]

Windows 8.1 for x64-based Systems

Microsoft .NET Framework 4.5.2(3210137)

Not applicable[4]

All previously released updates[4]

Windows 8.1 for 32-bit Systems

Microsoft .NET Framework 4.6/4.6.1(3210135)

Not applicable[4]

All previously released updates[4]

Windows 8.1 for x64-based Systems

Microsoft .NET Framework 4.6/4.6.1(3210135)

Not applicable[4]

All previously released updates[4]

Windows 8.1 for 32-bit Systems

Microsoft .NET Framework 4.6.2(3205378)

ImportantInformation Disclosure

None

Windows 8.1 for x64-based Systems

Microsoft .NET Framework 4.6.2(3205378)

ImportantInformation Disclosure

None

Windows 8.1 RT

Windows 8.1 RT

Microsoft .NET Framework 4.5.2(3210137)

Not applicable[4]

All previously released updates[4]

Windows 8.1 RT

Microsoft .NET Framework 4.6/4.6.1(3210135)

Not applicable[4]

All previously released updates[4]

Windows 8.1 RT

Microsoft .NET Framework 4.6.2(3205378)

ImportantInformation Disclosure

None

Windows 2012 R2

Windows Server 2012 R2

Microsoft .NET Framework 3.5(3210132)

Not applicable[4]

None

Windows Server 2012 R2

Microsoft .NET Framework 4.5.2(3210137)

Not applicable[4]

All previously released updates[4]

Windows Server 2012 R2

Microsoft .NET Framework 4.6/4.6.1(3210135)

Not applicable[4]

All previously released updates[4]

Windows Server 2012 R2

Microsoft .NET Framework 4.6.2(3205378)

ImportantInformation Disclosure

None

Windows 10

Windows 10 Version 1607 for 32-bit Systems [3](3206632)

Microsoft .NET Framework 4.6.2

ImportantInformation Disclosure

3200970

Windows 10 Version 1607 for x64-based Systems [3](3206632)

Microsoft .NET Framework 4.6.2

ImportantInformation Disclosure

3200970

Windows Server 2016 for x64-based Systems [3](3206632)

Microsoft .NET Framework 4.6.2

ImportantInformation Disclosure

3200970

Server Core installation option

Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)

Microsoft .NET Framework 3.5.1(3210131)

Not applicable[4]

None

Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)

Microsoft .NET Framework 4.6/4.6.1(3210136)

Not applicable[4]

All previously released updates[4]

Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)

Microsoft .NET Framework 4.6.2(3205379)

ImportantInformation Disclosure

None

Windows Server 2012 (Server Core installation)

Microsoft .NET Framework 3.5(3210130)

Not applicable[4]

None

Windows Server 2012 (Server Core installation)

Microsoft .NET Framework 4.5.2(3210138)

Not applicable[4]

All previously released updates[4]

Windows Server 2012 (Server Core installation)

Microsoft .NET Framework 4.6/4.6.1(3210133)

Not applicable[4]

All previously released updates[4]

Windows Server 2012 (Server Core installation)

Microsoft .NET Framework 4.6.2(3205377)

ImportantInformation Disclosure

None

Windows Server 2012 R2 (Server Core installation)

Microsoft .NET Framework 3.5(3210132)

Not applicable[4]

None

Windows Server 2012 R2 (Server Core installation)

Microsoft .NET Framework 4.5.2(3210137)

Not applicable[4]

All previously released updates[4]

Windows Server 2012 R2 (Server Core installation)

Microsoft .NET Framework 4.6/4.6.1(3210135)

Not applicable[4]

All previously released updates[4]

Windows Server 2012 R2 (Server Core installation)

Microsoft .NET Framework 4.6.2(3205378)

ImportantInformation Disclosure

None

Windows Server 2016 for x64-based Systems (Server Core installation)[3](3206632)

Microsoft .NET Framework 4.6.2

ImportantInformation Disclosure

3200970

[1]Beginning with the October 2016 release, Microsoft has changed the update servicing model for Microsoft .NET Framework.

For more information, please see this Microsoft .NET Blog Post.[2] This number is the Parent package KB number. Users will be offered the Parent KB; however, the package KB numbers listed for each platform will be displayed in Add Remove Programs.[3]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 available via the Microsoft Update Catalog. Please note that effective December 13, 2016, Windows 10 and Windows Server 2016 details for the Cumulative Updates will be documented in Release Notes. Please refer to the Release Notes for OS Build numbers, Known Issues, and affected file list information.[4]Microsoft .NET Framework 2.0, 4.5.2 and 4.6/4.6.1 are rollup patches and include all previous updates as well as this month’s updates. Please see This Page for more information.Note The vulnerability discussed in this bulletin affects Windows Server 2016 Technical Preview 5.

An update is available for Windows Server 2016 Technical Preview 5 via Windows Update.

To be protected from the vulnerability, Microsoft recommends that customers running Windows Server 2016 Technical Preview 5 upgrade to Windows Server 2016.

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