CVE-2021-38646
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
- Record
CVE-2021-38646- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-25085
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
- Record
EUVD-2021-25085- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-846x-h43v-68x9
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
- Record
GHSA-846x-h43v-68x9- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
CISA KEV No score
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
Microsoft Office Access Connectivity Engine contains an unspecified vulnerability which can allow for remote code execution.
- Record
CVE-2021-38646- Updated
- 2026-11-02
NVD
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
- Record
CVE-2021-38646- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-38646 is a high vulnerability (CVSS 7.8) in Microsoft Office, published September 15, 2021. CISA lists it as known to be exploited, since March 28, 2022. EUVD reports exploitation since March 28, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 7.99%, the 94th percentile. No source names a fixed version.