Microsoft · Security update · November 10, 2020

KB4586823: November 2020 security update

KB4586823, released November 10, 2020, fixes 33 CVEs across 4 products. One of them is being exploited (CVE-2020-17087); 1 on CISA KEV. Patch Radar priority: Patch now.

Patch now1 on CISA KEV1 publicly disclosed

CVEs closed

2 rated Critical

Exploited

CVE-2020-17087

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.2710

98th percentile

Priority of the 33 CVEs

Patch now 1
                                Urgent 5
                                High 19
                                Routine 8

Applies to

Product
Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based systems
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Patch now	CVE-2020-17087	Windows Kernel	Elevation of Privilege	7.8	0.0543	KEVDisclosedExploited
Urgent	CVE-2020-17051	Microsoft Windows	Remote Code Execution	9.8	0.1062	More likely
Urgent	CVE-2020-17042	Microsoft Windows	Remote Code Execution	8.8	0.0511	Exploitation Less Likely
Urgent	CVE-2020-17056	Microsoft Windows	Information Disclosure	5.5	0.0131	More likely
Urgent	CVE-2020-17038	Microsoft Graphics Component	Elevation of Privilege	7.8	0.0100	More likely
Urgent	CVE-2020-17088	Windows Common Log File System Driver	Elevation of Privilege	7.8	0.0088	More likely
High	CVE-2020-17047	Microsoft Windows	Denial of Service	7.5	0.2710	Exploitation Less Likely
High	CVE-2020-16997	Microsoft Windows	Information Disclosure	7.7	0.0403	Exploitation Less Likely
High	CVE-2020-17043	Microsoft Windows	Elevation of Privilege	7.8	0.0285	Exploitation Less Likely
High	CVE-2020-17044	Microsoft Windows	Elevation of Privilege	7.8	0.0285	Exploitation Less Likely
High	CVE-2020-17055	Microsoft Windows	Elevation of Privilege	7.8	0.0285	Exploitation Less Likely
High	CVE-2020-17011	Microsoft Windows	Elevation of Privilege	7.8	0.0104	Exploitation Less Likely
High	CVE-2020-17001	Microsoft Windows	Elevation of Privilege	7.8	0.0100	Exploitation Less Likely
High	CVE-2020-17024	Microsoft Windows	Elevation of Privilege	7.8	0.0099	Exploitation Less Likely
High	CVE-2020-17041	Microsoft Windows	Elevation of Privilege	7.8	0.0099	Exploitation Less Likely
High	CVE-2020-17068	Microsoft Graphics Component	Remote Code Execution	7.8	0.0098	Exploitation Less Likely
High	CVE-2020-17014	Microsoft Windows	Elevation of Privilege	7.8	0.0095	Exploitation Less Likely
High	CVE-2020-17026	Microsoft Windows	Elevation of Privilege	7.8	0.0093	Exploitation Less Likely
High	CVE-2020-17027	Microsoft Windows	Elevation of Privilege	7.8	0.0092	Exploitation Less Likely
High	CVE-2020-17031	Microsoft Windows	Elevation of Privilege	7.8	0.0092	Exploitation Less Likely
High	CVE-2020-17034	Microsoft Windows	Elevation of Privilege	7.8	0.0092	Exploitation Less Likely
High	CVE-2020-17025	Microsoft Windows	Elevation of Privilege	7.8	0.0091	Exploitation Less Likely
High	CVE-2020-17028	Microsoft Windows	Elevation of Privilege	7.8	0.0091	Exploitation Less Likely
High	CVE-2020-17032	Microsoft Windows	Elevation of Privilege	7.8	0.0091	Exploitation Less Likely
High	CVE-2020-17033	Microsoft Windows	Elevation of Privilege	7.8	0.0091	Exploitation Less Likely

Released the same day

KB4484455
Microsoft Office 2010 Service Pack 2 (32-bit editions), Microsoft Office 2010 Service Pack 2 (64-bit editions)
KB4484508
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB4484520
Microsoft Office 2013 RT Service Pack 1, Microsoft Office 2013 Service Pack 1 (32-bit editions), Microsoft Office 2013 Service Pack 1 (64-bit editions)
KB4484534
Microsoft Office 2010 Service Pack 2 (32-bit editions), Microsoft Office 2010 Service Pack 2 (64-bit editions)
KB4486706
Microsoft SharePoint Server 2010 Service Pack 2
KB4486713
Microsoft Office Online Server
KB4486714
Microsoft SharePoint Server 2019
KB4486717
Microsoft SharePoint Enterprise Server 2016
KB4486718
Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)
KB4486719
Microsoft Word 2016 (32-bit edition), Microsoft Word 2016 (64-bit edition)
KB4486722
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB4486723
Microsoft SharePoint Enterprise Server 2013 Service Pack 1

Vendor advisory

https://support.microsoft.com/help/4586823

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