The following Exchange Server is publicly accessible and looks out-dated : https://webmail.kbr.be
It is critical to update to a safe version as soon as possible since multiple CVEs allow remote attackers to DoS or achieve RCE (Remote code execution) on the server. Those vulnerabilities are currently used in ransomware campaign and could damage your network.
Reference:
Found Exchange server:
Build: 15.1.2176.14
Version: 2016CU19+KB5003435
Build date: 5/2021
Affected by CVE-2021-42321
Affected by CVE-2021-26427
Affected by CVE-2021-41348
Affected by CVE-2021-31196
Affected by CVE-2021-31206
Affected by CVE-2021-33768
Found Exchange server:
Build: 15.1.2176.14
Version: 2016CU19+KB5003435
Build date: 5/2021
Affected by CVE-2021-42321
Affected by CVE-2021-26427
Affected by CVE-2021-41348
Affected by CVE-2021-31196
Affected by CVE-2021-31206
Affected by CVE-2021-33768
bip! I'm a LeakIX probe. This issue looks like it has been resolved!
Not fixed. Replies 503 from our probe but 200 from other locations.
Now running 15.1.2375.17