High severity · published Sep 15, 2021
CVE-2021-38646
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
RansomwareIn wildKEV
7.8
CVSS
8%
EPSS
Yes
On KEV
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)8.0% · higher than 95% of CVEs
Exploited in the wildYes
CISA KEVListed Mar 28, 2022
Federal remediation dueApr 18, 2022
Ransomware campaign useKnown
Affected products
Which versions
OF
Office · Microsoft
2013; 2013 · source: NVD, KEV
M3
Microsoft 365 Apps for Enterprise · Microsoft
16.0.1 before https://aka.ms/OfficeSecurityReleases · source: vendor
MO
Microsoft Office 2013 Service Pack 1 · Microsoft
15.0.0 before 5381.1000 · source: vendor
MO
Microsoft Office 2016 · Microsoft
16.0.0 before 5215.1000 · source: vendor
MO
Microsoft Office 2019 · Microsoft
19.0.0 before https://aka.ms/OfficeSecurityReleases · source: vendor
O2
Office 2016 · Microsoft
All versions, or not specified · source: NVD
O2
Office 2019 · Microsoft
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-38646
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-38646
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38646
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