CVE-2021-38646
Actively exploited. CVE-2021-38646 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-28) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Microsoft Office Access Connectivity Engine contains an unspecified vulnerability which can allow for remote code execution.
CSIRTS triage
- What
- An unspecified vulnerability in Microsoft Office Access Connectivity Engine can allow for remote code execution.
- Who is affected
- Users of Microsoft Office Access Connectivity Engine.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Update Microsoft Office to the latest version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 90% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2021-38646: Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerabilitycisa-kev · 2022-03-28
External references
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[](https://www.csirts.com/cve/CVE-2021-38646)