⚠ Actively exploited in ransomware campaigns

This vulnerability is on the CISA Known Exploited Vulnerabilities list and has been used in known ransomware attacks. CISA required action: Apply updates per vendor instructions.. Due date: 2022-04-18.

CVE-2021-38646

CWE-119 — Buffer Overflow6 documents6 sources

Severity

7.8HIGH

EPSS

50.9%

top 2.13%

CISA KEV

KEVRansomware

Added 2022-03-28

Due 2022-04-18

Exploit

Exploited in wild

Active exploitation observed

Affected products

Microsoft Microsoft 365 Apps FOR Enterprise Microsoft Microsoft Office 2013 Service Pack 1 Microsoft Microsoft Office 2016 +2 more

Timeline

PublishedSep 15

KEV addedMar 28

KEV dueApr 18

Latest updateMay 24

CISA Required Action: Apply updates per vendor instructions.

Description

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages5 packages

▶CVEListV5microsoft/microsoft_office_201616.0.0 — 5215.1000

▶CVEListV5microsoft/microsoft_office_201919.0.0 — https://aka.ms/OfficeSecurityReleases

▶CVEListV5microsoft/microsoft_office_2013_service_pack_115.0.0 — 5381.1000

▶NVDmicrosoft/office2013, 2016, 2019+2

▶CVEListV5microsoft/microsoft_365_apps_for_enterprise16.0.1 — https://aka.ms/OfficeSecurityReleases

Patches

Patch: portal.msrc.microsoft.com ↗Patch: portal.msrc.microsoft.com ↗

🔴Vulnerability Details

GHSA

GHSA-846x-h43v-68x9: Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability↗2022-05-24

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CVEList

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability↗2021-09-15

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VulnCheck

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability↗2021

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📋Vendor Advisories

CISA

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability↗2022-03-28

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Microsoft

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability↗2021-09-14

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