Clarification that ArcGIS is not vulnerable to the SolarWinds Orion issue
Significant recent security and privacy challenges and how ArcGIS Online has you covered.
COVID-19 geospatial information is highly valued - Counter risks by addressing security & privacy aspects during this emergency event
The browser accessible map dashboard providing information concerning the Coronavirus is safe to use.
Critical vulnerability in Tomcat could affect your ArcGIS deployment
Statement concerning the widely announced CVE-2020-0601 Microsoft OS cryptographic vulnerability and Esri products.
Esri Mobile Security Whitepaper, ArcGIS Online Cloud Security Alliance answers, and ArcGIS Online Security Advisor extensively updated.
Customers that have configured the SAML options "Enabled Signed Requests" or "Encrypt Assertion" must update their ArcGIS Online metadata file.
ArcGIS Online will enforce HTTPS Only for all organizations December 2020 - Organizations with HTTP (Clear-text) links should prepare now.