CVE-2021-38646
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Office, fix it now.
CISA required action: Apply updates per vendor instructions.
US federal civilian agencies must remediate by Apr 18, 2022.
Patch status
Official fix available since
Apply the vendor's update to every affected system. Check the fixed-in versions below where known.
Basis: NVD patch reference
Description
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Affected products
| Product | Vendor | Affected versions | Source |
|---|---|---|---|
| Office | Microsoft | 2013 | KEV |
Sources: KEV = CISA Known Exploited Vulnerabilities catalog.
Intelligence timeline
Developments from the last 30 days, newest first.
- CVSS scoredUpdateKEV
CVE-2021-38646 scored CVSS 7.8: Microsoft Office, Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched Office systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
- Patch releasedUpdateKEV
Patch released for CVE-2021-38646: Microsoft Office, Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
An official fix is now available for Microsoft Office. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference
1 earlier event is available with a subscription. See plans.
Coverage
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