CVE-2021-38646
Act now ● On CISA KEV — actively exploited used in ransomware
Actively exploited — on the CISA KEV list.
CVSS base
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
8.0%
94.5th percentile
CISA KEV
Listed
Added 2022-03-28 · patch by 2022-04-18
Weakness / dates
—
Published 2021-09-15 · modified 2026-08-10
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | R | Required |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2021-09-15 — Published (NVD)
- 2022-03-28 — Added to CISA KEV (actively exploited)
- 2022-04-18 — CISA patch-by deadline
- 2026-08-10 — Last modified (NVD)
Description
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability