The U.S. Cybersecurity and Infrastructure Security Agency (CISA) and the FBI issued a joint advisory warning of active exploitation of vulnerabilities in Microsoft Exchange on-premises products by nation-state actors and cybercriminals. The agencies say the attacks have primarily targeted local governments, academic institutions, non-governmental organizations, and business entities in various industry sectors. The development comes in light of the rapid expansion of attacks aimed at vulnerable Exchange Servers, with multiple threat actors exploiting the vulnerabilities as early as February 27.
Source: https://thehackernews.com/2021/03/proxylogon-exchange-poc-exploit.html