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CVE-2025-21366— 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是美国微软（Microsoft）公司的一款办公软件套件产品。该产品常用组件包括Word、Excel、Access、Powerpoint、FrontPage等。 Microsoft Office存在资源管理错误漏洞。以下产品和版本受到影响：Microsoft Office 2019 for 32-bit editions,Microsoft Office 2019 for 64-bit editions,Microsoft 365 Apps for Enterprise fo

CVSS 7.8 · High EPSS 1.11% · P63

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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< 16.0.5483.1001 affected
Microsoft Microsoft Access 2016 (32-bit edition) 16.0.0< 16.0.5483.1001 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-2025-21366

Vulnerability Information
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Vulnerability Title
Microsoft Access Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Microsoft Access Remote Code Execution Vulnerability
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
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Office 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Office是美国微软（Microsoft）公司的一款办公软件套件产品。该产品常用组件包括Word、Excel、Access、Powerpoint、FrontPage等。 Microsoft Office存在资源管理错误漏洞。以下产品和版本受到影响：Microsoft Office 2019 for 32-bit editions,Microsoft Office 2019 for 64-bit editions,Microsoft 365 Apps for Enterprise fo
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 ~ 16.0.5483.1001 -
Microsoft Microsoft Access 2016 (32-bit edition) 16.0.0 ~ 16.0.5483.1001 -
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-2025-21366

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III. Intelligence Information for CVE-2025-21366

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Vendor Advisories for CVE-2025-21366 (1)

Same Patch Batch · Microsoft · 2025-01-14 · 157 CVEs total

CVE-2025-21298 9.8 CRITICAL Windows OLE Remote Code Execution Vulnerability
CVE-2025-21311 9.8 CRITICAL Windows NTLM V1 Elevation of Privilege Vulnerability
CVE-2025-21307 9.8 CRITICAL Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability
CVE-2025-21292 8.8 HIGH Windows Search Service Elevation of Privilege Vulnerability
CVE-2025-21266 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21282 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21293 8.8 HIGH Active Directory Domain Services Elevation of Privilege Vulnerability
CVE-2025-21291 8.8 HIGH Windows Direct Show Remote Code Execution Vulnerability
CVE-2025-21302 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21303 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21306 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21176 8.8 HIGH .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability
CVE-2025-21178 8.8 HIGH Visual Studio Remote Code Execution Vulnerability
CVE-2025-21273 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21223 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21240 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21238 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21417 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21245 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21409 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability

Showing top 20 of 157 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Microsoft 365 Apps for Enterprise
Same vendor: Microsoft
Same weakness: CWE-416

V. Comments for CVE-2025-21366

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