Use After Free Vulnerability in Microsoft Office Word

CVE-2026-40361

What is CVE-2026-40361?

CVE-2026-40361 is a critical vulnerability identified within Microsoft Office Word, a widely used word processing software essential for document creation and editing across various industries. This specific flaw manifests as a use after free vulnerability, which occurs when a program continues to use memory after it has been freed, potentially allowing attackers to execute arbitrary code on the affected system. The implications are significant; organizations relying on Microsoft Office Word for documentation could find their systems compromised, leading to unauthorized control, data breaches, and severe operational disruptions.

Potential impact of CVE-2026-40361

1. Unauthorized Code Execution: The vulnerability enables attackers to execute malicious code locally, which can result in total system compromise. This means that sensitive data could be accessed or manipulated without the consent of the user.

2. Data Breaches: Exploiting this vulnerability could lead to the leak of confidential information, including intellectual property and personal data, thereby violating data protection regulations and impacting organizational reputation.

3. Operational Disruption: Successful exploitation might disrupt business operations, leading to downtime and potential financial losses due to the remediation efforts required to secure the affected systems and recover from the attack.

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News Articles

Securityweek

CVE-2026-40361

Microsoft Patches Critical Zero-Click Outlook Vulnerability Threatening Enterprises

Microsoft patches a critical Outlook vulnerability tracked as CVE-2026-40361 that can be exploited for remote code execution.

3 weeks ago

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