Microsoft Security Response Center

**According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?** A user interacting with the file in multiple ways will cause the NTLM hash to be leaked. A few interactions which trigger this leak include: * Opening the parent folder in Explorer * Clicking the file (any mouse button) * Dragging the file * Deleting the file

**How could an attacker exploit this vulnerability?** A remote, unauthenticated attacker could send a crafted event that triggers unsafe object deserialization in a legacy serialization mechanism, resulting in remote code execution.

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires an attacker to win a race condition.

Exposure of sensitive information to an unauthorized actor in Microsoft Failover Cluster Virtual Driver allows an authorized attacker to disclose information locally.

Improper access control in Microsoft Windows Search Component allows an authorized attacker to deny service locally.

Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

Use after free in Microsoft Office Visio allows an unauthorized attacker to execute code locally.

**What privileges could be gained by an attacker who successfully exploited the vulnerability?** An attacker who successfully exploited this vulnerability could gain administrator privileges.

**According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?** An attacker must send the user a malicious file and convince them to open it.

**What type of information could be disclosed by this vulnerability?** An attacker who successfully exploited this vulnerability could potentially read small portions of heap memory.