Product:
Windows Hyper-V
Summary
Improper input validation in Windows Hyper-V allows an authorized attacker to execute code locally. This vulnerability can lead to significant impacts on confidentiality, integrity, and availability. Attackers with low privileges can exploit this flaw if they have local access to the system.
Details
| Severity | Base Score | CVE |
|---|---|---|
| HIGH | 7.3 | CVE-2026-21247 |
Exploitation
To exploit this vulnerability, an attacker must have local access to the affected system and be able to interact with the Hyper-V environment. By providing specially crafted input, the attacker can bypass input validation checks, leading to arbitrary code execution. This requires the attacker to have some level of user interaction, making it essential for them to gain access to the target machine.
Affected Products
- Windows Hyper-V: A virtualization technology that allows users to create and manage virtual machines on Windows systems.
Mitigation
To mitigate this vulnerability, users should ensure that they apply the latest security updates provided by Microsoft. Regularly updating the system and monitoring for any unusual activity can help reduce the risk of exploitation. Additionally, limiting local access to trusted users can further protect against potential attacks.