I put in the same settings as you (screen), but it still doesn't work.
Logs:
[wazuh-user@wazuh-server ~]$ grep -i 'vuln' /var/ossec/logs/ossec.log
2024/07/12 12:48:04 wazuh-modulesd:vulnerability-scanner: INFO: Starting vulnerability_scanner module.
2024/07/12 12:48:06 indexer-connector: WARNING: IndexerConnector initialization failed for index 'wazuh-states-vulnerabilities-wazuh-server', retrying until the connection is successful.
2024/07/12 12:48:06 wazuh-modulesd:vulnerability-scanner: INFO: Starting database file decompression.
2024/07/12 12:49:08 indexer-connector: INFO: IndexerConnector initialized successfully for index: wazuh-states-vulnerabilities-wazuh-server.
2024/07/12 12:49:35 wazuh-modulesd:vulnerability-scanner: INFO: Database decompression finished.
2024/07/12 12:49:36 wazuh-modulesd:vulnerability-scanner: INFO: Vulnerability scanner module started
2024/07/12 12:53:51 wazuh-modulesd:vulnerability-scanner: INFO: Initiating update feed process
2024/07/15 11:56:51 wazuh-modulesd:vulnerability-scanner: INFO: Starting vulnerability_scanner module.
2024/07/15 11:56:52 indexer-connector: WARNING: IndexerConnector initialization failed for index 'wazuh-states-vulnerabilities-wazuh-server', retrying until the connection is successful.
2024/07/15 11:56:53 wazuh-modulesd:vulnerability-scanner: INFO: Vulnerability scanner module started
2024/07/15 09:57:33 wazuh-modulesd:vulnerability-scanner: INFO: Initiating update feed process
2024/07/15 09:57:33 wazuh-modulesd:vulnerability-scanner: ERROR: Error updating feed: [json.exception.out_of_range.401] array index 1 is out of range, trying to re-download the feed.
2024/07/15 09:58:39 wazuh-modulesd:vulnerability-scanner: INFO: Initiating update feed process
2024/07/15 10:14:42 wazuh-modulesd:vulnerability-scanner: INFO: Starting vulnerability_scanner module.
2024/07/15 10:14:43 indexer-connector: WARNING: IndexerConnector initialization failed for index 'wazuh-states-vulnerabilities-wazuh-server', retrying until the connection is successful.
2024/07/15 10:14:43 wazuh-modulesd:vulnerability-scanner: ERROR: Error opening the database: Vendor map can not be found in DB., trying to re-download the feed.
2024/07/15 10:14:44 wazuh-modulesd:vulnerability-scanner: INFO: Vulnerability scanner module started
2024/07/15 10:14:52 wazuh-modulesd:vulnerability-scanner: ERROR: VulnerabilityScannerFacade::initEventDispatcher: Empty OS data from Wazuh-DB (agent 001).
2024/07/15 10:15:14 indexer-connector: INFO: IndexerConnector initialized successfully for index: wazuh-states-vulnerabilities-wazuh-server.
2024/07/15 10:15:37 wazuh-modulesd:vulnerability-scanner: INFO: Initiating update feed process
2024/07/15 11:16:21 wazuh-modulesd:vulnerability-scanner: ERROR: Error updating feed: Invalid line. file: queue/vd_updater/tmp/contents/vd_1.0.0_vd_4.8.0_756338_1720112313.json, trying to re-download the feed.
2024/07/15 11:16:21 wazuh-modulesd:vulnerability-scanner: INFO: Initiating update feed process
2024/07/15 11:16:21 wazuh-modulesd:vulnerability-scanner: ERROR: Error updating feed: Unable to find resource., trying to re-download the feed.
2024/07/15 11:16:42 wazuh-modulesd:vulnerability-scanner: INFO: Initiating update feed process
2024/07/15 12:06:45 wazuh-modulesd:vulnerability-scanner: INFO: Starting vulnerability_scanner module.
2024/07/15 12:06:46 indexer-connector: WARNING: IndexerConnector initialization failed for index 'wazuh-states-vulnerabilities-wazuh-server', retrying until the connection is successful.
2024/07/15 12:06:47 wazuh-modulesd:vulnerability-scanner: ERROR: Error opening the database: Error getting CNA Mapping content from rocksdb., trying to re-download the feed.
2024/07/15 12:06:48 wazuh-modulesd:vulnerability-scanner: INFO: Vulnerability scanner module started
2024/07/15 12:07:40 wazuh-modulesd:vulnerability-scanner: INFO: Initiating update feed process
2024/07/15 12:07:48 indexer-connector: INFO: IndexerConnector initialized successfully for index: wazuh-states-vulnerabilities-wazuh-server.
2024/07/15 12:10:32 wazuh-modulesd:vulnerability-scanner: INFO: Stopping vulnerability_scanner module.
2024/07/15 12:10:32 wazuh-modulesd:vulnerability-scanner: INFO: Feed update interrupted: Module stopped.
2024/07/15 12:10:32 wazuh-modulesd:vulnerability-scanner: INFO: Initiating update feed process
2024/07/15 12:10:32 wazuh-modulesd:vulnerability-scanner: INFO: Feed update interrupted: Module stopped.
2024/07/15 12:11:23 wazuh-modulesd:vulnerability-scanner: INFO: Starting vulnerability_scanner module.
2024/07/15 12:11:24 indexer-connector: WARNING: IndexerConnector initialization failed for index 'wazuh-states-vulnerabilities-wazuh-server', retrying until the connection is successful.
2024/07/15 12:11:25 wazuh-modulesd:vulnerability-scanner: ERROR: Error opening the database: Vendor map can not be found in DB., trying to re-download the feed.
2024/07/15 12:11:25 wazuh-modulesd:vulnerability-scanner: INFO: Vulnerability scanner module started
2024/07/15 12:12:17 wazuh-modulesd:vulnerability-scanner: INFO: Initiating update feed process
2024/07/15 12:12:26 indexer-connector: INFO: IndexerConnector initialized successfully for index: wazuh-states-vulnerabilities-wazuh-server.
You have new mail in /var/spool/mail/wazuh-user
[wazuh-user@wazuh-server ~]$
thanks!