A critical flaw in Rockwell PLCs allows attackers to fiddle with them (CVE-2021-22681) Microsoft has released out-of-band security updates for seven bugs affecting Microsoft Exchange Servers, four of which are zero-day vulnerabilities being exploited by attackers in the wild to plunder on-premises machines. The long tail of DIY bot operators is an increasingly difficult challenge, which is why it continues to make headlines across industries and varying aspects of online businesses. The Department of Defense (DoD) Cybersecurity Maturity Model Certification (CMMC) compliance requirement is the hot news topic of 2021.
Source: https://www.helpnetsecurity.com/2021/03/07/week-in-review-exchange-servers-under-attack-disinformation-economics-patch-tuesday-forecast/

