CVE-2025-21395 is a high-severity remote code execution vulnerability affecting Microsoft Access and related applications. The vulnerability, identified in Microsoft 365 Apps and Office products, presents a significant risk to organizations that utilize these services. With a CVSS score of 7.8, this vulnerability allows attackers to execute arbitrary code locally, which could lead to the compromise of sensitive data and system integrity.
The exploitation of this vulnerability requires user interaction, which increases the potential for successful attacks if users are not vigilant. Organizations need to prioritize patching this vulnerability immediately to safeguard their systems from potential threats.
Published on January 14, 2025, this vulnerability has been classified as analyzed, signaling that further remediation steps are necessary. Organizations must take proactive measures to mitigate the risks associated with this vulnerability.
Risk to organizations includes unauthorized access to sensitive information and possible system disruptions. Organizations should address this vulnerability in their priority patch cycle.
Vulnerability Details
The vulnerability allows for remote code execution within Microsoft Access. The CVSS score of 7.8 indicates a high level of severity, primarily due to the potential impacts on confidentiality, integrity, and availability. The affected products include Microsoft 365 Apps and various Office versions, specifically targeting both x64 and x86 architectures.
The official description categorizes this as a remote code execution vulnerability, classified under CWE-122. Given its nature, the potential for exploitation is significant, especially in environments where user interaction is a common element of workflow.
The publication date of this vulnerability was January 14, 2025, and it is essential for organizations to stay updated with security patches to protect their systems from such vulnerabilities.
Technical Analysis
The root cause of CVE-2025-21395 is linked to improper validation of user input within Microsoft Access. This flaw allows attackers to execute arbitrary code if they can entice a user to interact with a malicious file or link.
Attack vector is local, requiring access to the system where Microsoft Access is installed. The attack complexity is low, making it easier for attackers to exploit this vulnerability. Notably, no privileges are required, and user interaction is necessary, which can be achieved through phishing or misleading prompts.
The impacts of this vulnerability are severe, with potential high confidentiality, integrity, and availability impacts, emphasizing the need for immediate remediation.
Risk & Impact Analysis
Organizations face real-world deployment risks from this vulnerability, with potential exploitation leading to unauthorized access to sensitive information and disruption of services. The blast radius is considerable due to the widespread use of Microsoft Access and related products in various organizational environments.
The urgency for patching is high, given the CVSS score of 7.8 and the exploitation potential that exists. Organizations should evaluate their exposure to this vulnerability and prioritize remediation efforts accordingly.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include Microsoft 365 Apps, Microsoft Access 2016, and various Office Long Term Servicing Channel releases for both x64 and x86 architectures. Organizations should review their installed versions to determine exposure to this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching to the latest versions of Microsoft products. It is essential to monitor for updates from Microsoft and apply patches as they become available. In environments where immediate patching is not feasible, organizations should consider implementing network controls to limit access to vulnerable applications.
For ongoing security assessments, organizations can benefit from engaging in penetration testing to identify vulnerabilities in their systems.
Detection Guidance
Organizations should monitor logs for unusual access patterns or anomalies that may indicate exploitation attempts. Additionally, behavioral monitoring can assist in identifying potential security incidents related to this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2025-21395 serves as a reminder of the importance of regular updates and patch management in maintaining security within Microsoft environments. The low complexity of exploitation highlights the need for proactive security measures.
Security teams should implement a robust vulnerability management program to continuously assess and remediate vulnerabilities.
Organizations should also consider leveraging penetration testing methodologies to identify and address security gaps effectively.
In conclusion, CVE-2025-21395 emphasizes the need for continuous vigilance and proactive security measures to protect against evolving threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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