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CVE-2026-64920— Microsoft Access Remote Code Execution Vulnerability

Quick assessment

Affected
Microsoft Microsoft 365 Apps for Enterprise
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Office Access是美国Microsoft公司的一款数据库管理软件。 Microsoft Office Access存在缓冲区错误漏洞，该漏洞源于堆缓冲区溢出，可能导致未经授权的攻击者在本地执行代码。

CVSS 7.8 · High EPSS 0.30% · P22

Affected Version Matrix 6

VendorProduct Version RangeStatus
Microsoft Microsoft 365 Apps for Enterprise 16.0.1< https://aka.ms/OfficeSecurityReleases affected
Microsoft Microsoft Access 2016 16.0.0< 16.0.5565.1000 affected
Microsoft Microsoft Access 2016 (32-bit edition) 16.0.0< 16.0.5565.1000 affected
Microsoft Microsoft Office 2019 19.0.0< https://aka.ms/OfficeSecurityReleases affected
Microsoft Microsoft Office LTSC 2021 16.0.1< https://aka.ms/OfficeSecurityReleases affected
Microsoft Microsoft Office LTSC 2024 16.0.0< https://aka.ms/OfficeSecurityReleases affected
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I. Basic Information for CVE-2026-64920

Vulnerability Information
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Vulnerability Title
Microsoft Access Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Office Access 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Office Access是美国Microsoft公司的一款数据库管理软件。 Microsoft Office Access存在缓冲区错误漏洞，该漏洞源于堆缓冲区溢出，可能导致未经授权的攻击者在本地执行代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft 365 Apps for Enterprise 16.0.1 ~ https://aka.ms/OfficeSecurityReleases -
Microsoft Microsoft Access 2016 16.0.0 ~ 16.0.5565.1000 -
Microsoft Microsoft Access 2016 (32-bit edition) 16.0.0 ~ 16.0.5565.1000 -
Microsoft Microsoft Office 2019 19.0.0 ~ https://aka.ms/OfficeSecurityReleases -
Microsoft Microsoft Office LTSC 2021 16.0.1 ~ https://aka.ms/OfficeSecurityReleases -
Microsoft Microsoft Office LTSC 2024 16.0.0 ~ https://aka.ms/OfficeSecurityReleases -

II. Public POCs for CVE-2026-64920

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III. Intelligence Information for CVE-2026-64920

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Vendor Advisories for CVE-2026-64920 (1)

Same Patch Batch · Microsoft · 2026-08-11 · 402 CVEs total

CVE-2026-62815 9.8 CRITICAL Microsoft QUIC Remote Code Execution Vulnerability
CVE-2026-62878 9.8 CRITICAL Windows DNS Server Remote Code Execution Vulnerability
CVE-2026-62893 9.8 CRITICAL Windows Deployment Services TFTP Server Remote Code Execution Vulnerability
CVE-2026-65791 9.8 CRITICAL Windows iSCSI Target Service Remote Code Execution Vulnerability
CVE-2026-59124 9.8 CRITICAL Microsoft High Performance Computing (HPC) Pack Remote Code Execution Vulnerability
CVE-2026-50516 9.4 CRITICAL Microsoft Azure Kubernetes Service Elevation of Privilege Vulnerability
CVE-2026-70306 9.3 CRITICAL Microsoft Office SharePoint Spoofing Vulnerability
CVE-2026-57104 8.8 HIGH Azure Storage Explorer Elevation of Privilege Vulnerability
CVE-2026-62795 8.8 HIGH Windows LDAP - Lightweight Directory Access Protocol Remote Code Execution Vulnerability
CVE-2026-62817 8.8 HIGH Windows DNS Server Remote Code Execution Vulnerability
CVE-2026-65811 8.8 HIGH Power BI Remote Code Execution Vulnerability
CVE-2026-62818 8.8 HIGH Windows Active Directory Certificate Services (AD CS) Remote Code Execution Vulnerability
CVE-2026-69320 8.8 HIGH Visual Studio Code Remote Code Execution Vulnerability
CVE-2026-62872 8.8 HIGH .NET Framework Elevation of Privilege Vulnerability
CVE-2026-62913 8.8 HIGH Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2026-62824 8.8 HIGH Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-62822 8.8 HIGH Windows GDI+ Remote Code Execution Vulnerability
CVE-2026-62823 8.8 HIGH Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-70324 8.8 HIGH Microsoft SharePoint Elevation of Privilege Vulnerability
CVE-2026-70337 8.8 HIGH Microsoft PowerShell Remote Code Execution Vulnerability

Showing top 20 of 402 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Microsoft 365 Apps for Enterprise
Same vendor: Microsoft
Same weakness: CWE-122

V. Comments for CVE-2026-64920

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