Microsoft Security Response Center

**Is the Preview Pane an attack vector for this vulnerability?** No, the Preview Pane is not an attack vector.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is uninitialized memory.

**Is the Preview Pane an attack vector for this vulnerability?** No, the Preview Pane is not an attack vector.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is the contents of Kernel memory. An attacker could read the contents of Kernel memory from a user mode process.

**Is the Preview Pane an attack vector for this vulnerability?** No, the Preview Pane is not an attack vector.

**How could an attacker exploit this vulnerability?** An attacker could send a specially crafted request to the Internet Storage Name Service (iSNS) server, which could result in remote code execution. **What is Windows iSNS?** The Internet Storage Name Service (iSNS) protocol is used for interaction between iSNS servers and iSNS clients. iSNS manages an Internet Storage Name Service (iSNS) server, providing a registration function to allow all entities in a storage network to register and query the iSNS database. **Is Windows iSNS installed by default?** No.

**How do I get the updated app?** The Microsoft Store will automatically update affected customers. Alternatively, customers can get the update immediately; see here for details. It is possible for customers to disable automatic updates for the Microsoft Store. The Microsoft Store will not automatically install this update for those customers. **My system is in a disconnected environment; is it vulnerable?** Customers using the Microsoft Store for Business and Microsoft Store for Education can get this update through their organizations. **How can I check if the update is installed?** If your device manufacturer preinstalled this app, package versions **2.0.23022.0** and later contain this update. If you purchased this app from the Microsoft Store, package versions **2.0.23022.0** and later contain this update. You can check the package version in PowerShell: `Get-AppxPackage -Name Microsoft.HEVCVideoExtension*`

**What version of Microsoft Defender for IoT has the update that protects from this vulnerability?** Version 10.5.2 and above. **What is the action required to take the update?** You need to update to the latest Microsoft Defender for IoT software version. See the **Update the software version section** of Manage the on-premises management console. **What is Microsoft Defender for IoT?** Microsoft Defender for IoT is a unified security solution for identifying IoT/OT devices, vulnerabilities, and threats. It enables you to secure your entire IoT/OT environment, whether you need to protect existing IoT/OT devices or build security into new IoT innovations. See Microsoft Defender for IoT for more information.

**What version of Microsoft Defender for IoT has the update that protects from this vulnerability?** Version 10.5.2 and above. **What is the action required to take the update?** You need to update to the latest Microsoft Defender for IoT software version. See the **Update the software version section** of Manage the on-premises management console. **What is Microsoft Defender for IoT?** Microsoft Defender for IoT is a unified security solution for identifying IoT/OT devices, vulnerabilities, and threats. It enables you to secure your entire IoT/OT environment, whether you need to protect existing IoT/OT devices or build security into new IoT innovations. See Microsoft Defender for IoT for more information.

**What version of Microsoft Defender for IoT has the update that protects from this vulnerability?** Version 10.5.2 and above. **What is the action required to take the update?** You need to update to the latest Microsoft Defender for IoT software version. See the **Update the software version section** of Manage the on-premises management console. **What is Microsoft Defender for IoT?** Microsoft Defender for IoT is a unified security solution for identifying IoT/OT devices, vulnerabilities, and threats. It enables you to secure your entire IoT/OT environment, whether you need to protect existing IoT/OT devices or build security into new IoT innovations. See Microsoft Defender for IoT for more information.