Access
CVE-2025-21366
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Memory lifecycle management
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 7.8 (HIGH). Attack characteristics: local attack vector, low complexity, no privileges required, user interaction required. EPSS exploitation probability: 1.85%. |
| Exploit ScenarioDerived | A local attacker with access to the system could access freed memory to execute arbitrary code or crash the application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAIv1 – Mar 28, 2026
Microsoft Access Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Use smart pointers or garbage-collected languages. Set pointers to NULL after freeing. Enable memory sanitizers.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Use After Free (CWE-416), which allows attackers to access freed memory to execute arbitrary code or crash the application. Affected products include: Microsoft 365 Apps, Microsoft Access, Microsoft Office, Microsoft Office Long Term Servicing Channel.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
Microsoft Access Remote Code Execution Vulnerability
Executive ViewAI
CVE-2025-21366 presents notable security risk, a use-after-free vulnerability rated CVSS 7.8. Exploitation could compromise the security of affected deployments. A patch is available and should be applied as part of regular vulnerability management.
Apply vendor patch. If immediate patching is not feasible: (1) Enable ASLR and DEP where available; (2) Implement network segmentation; (3) Monitor for exploitation indicators.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.
Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)CVE.org
Microsoft Access 2007 SP3, 2010 SP1 and SP2, and 2013 in Microsoft Office allows remote attackers to execute arbitrary c
Microsoft Access 2007 SP3, 2010 SP1 and SP2, and 2013 in Microsoft Office allows remote attackers to execute arbitrary c
Microsoft Access 2007 SP3, 2010 SP1 and SP2, and 2013 in Microsoft Office allows remote attackers to execute arbitrary c
Microsoft Access 2007 SP3, Excel 2007 SP3, InfoPath 2007 SP3, OneNote 2007 SP3, PowerPoint 2007 SP3, Project 2007 SP3, P
Unauthorized APE administration privileges can be achieved by reverse engineering one of the APE service tools. Rated cr
An arbitrary command injection vulnerability in the Cluster Server component of Veritas InfoScale allows an unauthentica
Stack-based buffer overflow in Microsoft Access enables remote code execution when a user opens a specially crafted data
Heap-based buffer overflow (CWE-122) in Microsoft Office Access enables network-delivered remote code execution across s
Heap-based buffer overflow in Microsoft Office Access enables remote code execution when a user opens a specially crafte
An issue was discovered in Veritas NetBackup Before 7.7.2 and NetBackup Appliance Before 2.7.2. Rated high severity (CVS
An issue was discovered in Veritas NetBackup Before 7.7.2 and NetBackup Appliance Before 2.7.2. Rated high severity (CVS
An issue was discovered in Veritas NetBackup Before 7.7.2 and NetBackup Appliance Before 2.7.2. Rated high severity (CVS
GitHub PoC
Exploit-DB