Exchange Server Attackers Launched Scans Within Five Minutes of Disclosure Phil Muncaster UK / EMEA News Reporter , Infosecurity Magazine The 2021 Cortex Xpanse Attack Surface Threat Report from Palo Alto Networks was compiled from scans of 50 million IP addresses associated with 50 global enterprises, carried out January-March 2021. The report revealed that as soon as new vulnerabilities are announced by vendors, attackers rush to take advantage, utilizing cheap cloud computing power to back their efforts. “Scans began within 15 minutes after CVE announcements were released between January and March. Attackers worked faster for the Microsoft Exchange Server zero-days, launching scans within five minutes of Microsoft’s March 2 announcement,” the report noted.