Merge branch 'master' into repo_sync_working_branch

windows/security/threat-protection/TOC.md

@@ -65,6 +65,7 @@
 ##### [Remediate vulnerabilities](microsoft-defender-atp/tvm-remediation.md)
 ##### [Exceptions for security recommendations](microsoft-defender-atp/tvm-exception.md)
 ##### [Plan for end-of-support software](microsoft-defender-atp/tvm-end-of-support-software.md)
+##### [Mitigate zero-day vulnerabilities](microsoft-defender-atp/tvm-zero-day-vulnerabilities.md)
 #### [Understand vulnerabilities on your devices]()
 ##### [Software inventory](microsoft-defender-atp/tvm-software-inventory.md)
 ##### [Vulnerabilities in my organization](microsoft-defender-atp/tvm-weaknesses.md)

windows/security/threat-protection/microsoft-defender-atp/enable-attack-surface-reduction.md

@@ -84,7 +84,7 @@ The following is a sample for reference, using [GUID values for ASR rules](attac
 
 `OMA-URI path: ./Vendor/MSFT/Policy/Config/Defender/AttackSurfaceReductionRules`
 
-`Value: {75668C1F-73B5-4CF0-BB93-3ECF5CB7CC84}=2|{3B576869-A4EC-4529-8536-B80A7769E899}=1|{D4F940AB-401B-4EfC-AADC-AD5F3C50688A}=2|{D3E037E1-3EB8-44C8-A917-57927947596D}=1|{5BEB7EFE-FD9A-4556-801D-275E5FFC04CC}=0|{BE9BA2D9-53EA-4CDC-84E5-9B1EEEE46550}=1`
+`Value: 75668C1F-73B5-4CF0-BB93-3ECF5CB7CC84=2|3B576869-A4EC-4529-8536-B80A7769E899=1|D4F940AB-401B-4EfC-AADC-AD5F3C50688A=2|D3E037E1-3EB8-44C8-A917-57927947596D=1|5BEB7EFE-FD9A-4556-801D-275E5FFC04CC=0|BE9BA2D9-53EA-4CDC-84E5-9B1EEEE46550=1`
 
 The values to enable, disable, or enable in audit mode are:
 

windows/security/threat-protection/microsoft-defender-atp/tvm-zero-day-vulnerabilities.md

@@ -0,0 +1,104 @@
+---
+title: Mitigate zero-day vulnerabilities - threat and vulnerability management
+description: A report showing vulnerable device trends and current statistics. The goal is for you to understand the breath and scope of your device exposure.
+keywords: mdatp-tvm vulnerable devices, mdatp, tvm, reduce threat & vulnerability exposure, reduce threat and vulnerability, monitor security configuration
+search.product: eADQiWindows 10XVcnh
+search.appverid: met150
+ms.prod: w10
+ms.mktglfcycl: deploy
+ms.sitesec: library
+ms.pagetype: security
+ms.author: ellevin
+author: levinec
+ms.localizationpriority: medium
+manager: dansimp
+audience: ITPro
+ms.collection: 
+- m365-security-compliance 
+- m365initiative-defender-endpoint 
+ms.topic: article
+---
+
+# Mitigate zero-day vulnerabilities - threat and vulnerability management
+
+[!INCLUDE [Microsoft 365 Defender rebranding](../../includes/microsoft-defender.md)]
+
+**Applies to:**
+
+- [Microsoft Defender Advanced Threat Protection (Microsoft Defender ATP)](https://go.microsoft.com/fwlink/p/?linkid=2146631)
+- [Threat and vulnerability management](next-gen-threat-and-vuln-mgt.md)
+
+>Want to experience Microsoft Defender ATP? [Sign up for a free trial.](https://www.microsoft.com/microsoft-365/windows/microsoft-defender-atp?ocid=docs-wdatp-portaloverview-abovefoldlink)
+
+A zero-day vulnerability is a publicly disclosed vulnerability for which no official patches or security updates have been released. Zero-day vulnerabilities often have high severity levels and are actively exploited.
+
+Threat and vulnerability management will only display zero-day vulnerabilities it has information about.
+
+## Find information about zero-day vulnerabilities
+
+Once a zero-day vulnerability has been found, information about it will be conveyed through the following experiences in the Microsoft Defender Security Center.
+
+### Threat and vulnerability management dashboard
+
+Find recommendations with a zero-day tag in the “Top security recommendation” card.
+
+![Top recommendations with a zero-day tag.](images/tvm-zero-day-dashboard.png)
+
+Find top software with the zero-day tag in the "Top vulnerable software" card.
+
+![Top vulnerable software with a zero-day tag.](images/tvm-zero-day-top-vulnerable-software.png)
+
+tvm-zero-day-top-vulnerable-software
+
+### Weaknesses page
+
+Find the named zero-day vulnerability along with a description and details.
+
+- If this vulnerability has a CVE-ID assigned, you’ll see the zero-day label next to the CVE name.
+
+- If this vulnerability has no CVE-ID assigned, you will find it under an internal, temporary name that looks like “TVM-XXXX-XXXX”. The name will be updated once an official CVE-ID has been assigned, but the previous internal name will still be searchable and found in the side-panel.
+
+![Zero day example for CVE-2020-17087 in weaknesses page.](images/tvm-zero-day-weakness-name.png)
+
+### Security recommendations page
+
+Clear suggestions regarding remediation and mitigation options, including workarounds if exist.
+
+When there is an application with associated zero-day vulnerability and additional vulnerabilities to address, you will get one recommendation regarding both.
+
+![Zero day example of Windows Server 2016 in the security recommendations page.](images/tvm-zero-day-security-recommendation.png)
+
+## Addressing the zero-day vulnerability
+
+Go to the security recommendation page and select the zero-day recommendation. A flyout will open with information about the zero-day and other vulnerabilities for that software.
+
+There will be a link to mitigation options and workarounds if they are available. Workarounds may help reduce the risk posed by this zero-day vulnerability until a patch or security update can be deployed.
+
+Open remediation options and choose the attention type. An "attention required" remediation option is recommended for the zero-day vulnerabilities, since an update hasn't been released yet. If there are older vulnerabilities for this software you wish to remediation, you can override the "attention required" remediation option and choose “update.”
+
+![Zero day example flyout example of Windows Server 2016 in the security recommendations page.](images/tvm-zero-day-software-flyout-400.png)
+
+## Patching the zero-day vulnerability
+
+When a patch is released for the zero-day, the recommendation will be changed to “Update” and a blue label next to it that says “New security update for zero day.”
+
+![Zero day example flyout example of Windows Server 2016 in the security recommendations page.](images/tvm-zero-day-patch.jpg)
+
+## Other places to find vulnerable software
+
+### Software inventory page
+
+Find software with the zero-day tag.
+
+![Zero day example of Windows Server 2016 in the software inventory page.](images/tvm-zero-day-software-inventory.png)
+
+### Software page
+
+Find a zero-day tag for each software that has been affected by the zero–day vulnerability.
+
+![Zero day example for Windows Server 2016 software page.](images/tvm-zero-day-software-page.png)
+
+## Related topics
+
+- [Threat and vulnerability management overview](next-gen-threat-and-vuln-mgt.md)
+- [Security recommendations](tvm-security-recommendation.md)