Updates the vulnerability policy for your hosts protected by Defender.
All rules in the policy are updated in a single shot.

This endpoint maps to the policy table in **Defend > Vulnerabilities > Hosts > Running hosts** in the Console UI.


### cURL Request

Refer to the following example cURL command that overwrites all rules in your current policy with a new policy that has a single rule:

```bash
$ curl 'https://<CONSOLE>/api/v<VERSION>/policies/vulnerability/host' \
  -X PUT \
  -u <USER> \
  -H 'Content-Type: application/json' \
  -d \
'{
   "rules":[
      {
         "name":"<RULE_NAME>",
         "collections":[
            {
               "name":"<COLLECTION_NAME>"
            }
         ],
         "alertThreshold":{
            "disabled":false,
            "value":1
         }
      }
   ],
   "policyType":"hostVulnerability",
   "_id":"hostVulnerability"
}'
```

**Note:** No response will be returned upon successful execution.