Microsoft · Security update · March 12, 2021

KB4493225: March 2021 security update

KB4493225, released March 12, 2021, fixes 2 CVEs across 2 products. One of them is being exploited (CVE-2021-27059); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

Patch now1 on CISA KEVUnsupported product

CVEs closed

None rated Critical

Exploited

CVE-2021-27059

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.0608

93rd percentile

Priority of the 2 CVEs

Patch now 1
                                Urgent 0
                                High 1
                                Routine 0

Applies to

Product
Microsoft Office 2016 (32-bit edition)
Microsoft Office 2016 (64-bit edition)

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Patch now	CVE-2021-27059	Microsoft Office	Remote Code Execution	7.6	0.0608	KEVExploited
High	CVE-2021-24108	Microsoft Office	Remote Code Execution	7.8	0.0270	Exploitation Less Likely

Released the same day

KB4493228
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)
KB4504703
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/4493225

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