ACTIVELY EXPLOITED
CVE-2021-38646: Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
| Vendor | Microsoft |
|---|---|
| Product | Office |
| Actively exploited | Yes |
| Added to CISA KEV | 28 Mar 2022 |
| CISA federal deadline | 18 Apr 2022 |
| Ransomware use | Known |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
Microsoft Office Access Connectivity Engine contains an unspecified vulnerability which can allow for remote code execution.
SOURCES
Other Microsoft flaws
- patchtuesday:2026-11: Vulnerability in Microsoft
- CVE-2026-124194: Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability
- CVE-2026-96951: Microsoft Windows Command Injection Vulnerability
- CVE-2026-65660: Microsoft SharePoint Code Injection Vulnerability
- CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.