Microsoft Security Response Center

Use after free in Windows Resilient File System (ReFS) Deduplication Service allows an unauthorized attacker to elevate privileges locally.

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

**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.

**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.

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

Exposure of sensitive information to an unauthorized actor in Windows Push Notification Core allows an authorized attacker to disclose information locally.

Out-of-bounds read in Windows MapUrlToZone allows an unauthorized attacker to disclose information over a network.

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

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

**There are multiple update packages available for some of the affected software. Do I need to install all the updates listed in the Security Updates table for the software?** Yes. Customers should apply all updates offered for the software installed on their systems. If multiple updates apply, they can be installed in any order.