Product:
Microsoft Office
Summary
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally. This vulnerability can lead to significant impacts on confidentiality, integrity, and availability. Attackers can exploit this flaw to gain unauthorized access and execute arbitrary code.
Details
| Severity | Base Score | CVE |
|---|---|---|
| HIGH | 7.8 | CVE-2026-42831 |
Exploitation
To exploit this vulnerability, an attacker must have local access to the affected system and must convince a user to interact with a malicious file or application. Once the user opens the malicious content, the attacker can execute arbitrary code with the same privileges as the user, potentially leading to a complete compromise of the system.
Affected Products
- Microsoft Office: A widely used suite of productivity applications that may be vulnerable to local code execution due to this buffer overflow.
Mitigation
To mitigate this vulnerability, users should ensure that they apply the latest security updates from Microsoft. Additionally, users should avoid opening untrusted files or applications and implement security best practices to limit local access to sensitive systems.