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Home MicrosoftCVE-2021-38646

High

7.8CVSS

CVE-2021-38646

Vendor:Microsoft

Published: 15 Sept 2021

Updated 5mo ago

Generated remediation guidance and an executive summary. No account required.

Description

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector: local
Complexity: low
Privileges: none
User Action: required
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: NVD-CWE-noinfo

Metadata

Primary Vendor: MICROSOFT
Published: 9/15/2021
Last Modified: 10/30/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

microsoft : 365_appsmicrosoft : officemicrosoft : officemicrosoft : officemicrosoft : office

Remediation Guidance

Executive Summary

View on NIST NVD

Related reading

Use Microsoft vendor hub and 365 Apps product page to widen CVE-2021-38646 into its surrounding weakness, vendor, and product context.

Compare it with CVE-2026-21514, CVE-2026-26113 and CVE-2026-26110 for nearby disclosures in the same product family. Additional editorial context is available in Weekly Security Roundup: Navigating the April 2026 Threat Landscape and Critical Framework Exploits.

Fix CVE-2021-38646 - HIGH microsoft 365 apps | CVEDatabase.com