Microsoft · Security update · September 16, 2020

KB4484503: September 2020 security update

KB4484503, released September 16, 2020, fixes 4 CVEs in Microsoft Office Online Server. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

HighUnsupported product

CVEs closed

None rated Critical

Exploited

None reported

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.0435

91st percentile

Priority of the 4 CVEs

Patch now 0
                                Urgent 0
                                High 3
                                Routine 1

Applies to

Product
Microsoft Office Online Server

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
High	CVE-2020-1335	Microsoft Office	Remote Code Execution	7.8	0.0385	Exploitation Less Likely
High	CVE-2020-1338	Microsoft Office	Remote Code Execution	7.8	0.0385	Exploitation Less Likely
High	CVE-2020-1218	Microsoft Office	Remote Code Execution	7.8	0.0383	Exploitation Less Likely
Routine	CVE-2020-1224	Microsoft Office	Information Disclosure	5.5	0.0435	Exploitation Less Likely

Released the same day

KB4484466
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB4484469
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)
KB4484516
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB4484518
Microsoft Office Web Apps 2013 Service Pack 1
KB4484530
Microsoft Office 2010 Service Pack 2 (32-bit editions), Microsoft Office 2010 Service Pack 2 (64-bit editions)

Vendor advisory

https://support.microsoft.com/help/4484503

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