It has conducted widespread scanning to identify public-facing systems vulnerable to CVE-2021-44228 in Log4j and ProxyShell vulnerabilities; CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065 in on-premises MS Exchange Servers; and CVE-2018-13379 in Fortinet FortiOS SSL VPNs.