Merge branch 'master' into repo_sync_working_branch

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Denise Vangel-MSFT 2020-11-16 18:36:26 -08:00
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@ -49,46 +49,6 @@ The exposure score is broken down into the following levels:
You can remediate the issues based on prioritized [security recommendations](tvm-security-recommendation.md) to reduce the exposure score. Each software has weaknesses that are transformed into recommendations and prioritized based on risk to the organization.
## How the score is calculated
The exposure score is continuously calculated on each device in the organization. It is scored & evaluated based on the following categories:
- **Threats** - external and internal threats such as public exploit code and security alerts
- **Likelihood** - likelihood of the device to get breached given its current security posture
- **Value** - value of the device to the organization given its role and content
**Device exposure score** = (Threats + Likelihood) x Value
**Organization exposure score** = Avg (All device exposure scores) taking into account organization value multipliers
### Threats
Points are added based on whether the device has any vulnerabilities or misconfigurations, determined by the Common Vulnerability Scoring System (CVSS) base score.
Further points are added based on:
- Exploits availability and whether the exploit is verified or ranked
- A threat campaign is linked to the vulnerability or misconfiguration
### Likelihood
Points are added based on whether any of the following factors are true:
- The device is internet facing
- Specific compensating controls are misconfigured
- An exploit attempt is linked directly to a threat spotted in the organization
### Value
Points are added based on whether any of the following factors are true for a device:
- Contains high business impact (HBI) data
- Marked as a High Value Asset (HVA) or serves as an important server role (e.g. AD, DNS)
- Runs a business critical app (BCA)
- Used by a marked high value user (HVU) (e.g. domain admin, CEO)
If a device is valuable to your organization, it should increase the total organization exposure score.
## Reduce your threat and vulnerability exposure
Lower your threat and vulnerability exposure by remediating [security recommendations](tvm-security-recommendation.md). Make the most impact to your exposure score by remediating the top security recommendations, which can be viewed in the [threat and vulnerability management dashboard](tvm-dashboard-insights.md).