SolarWinds gained overnight notoriety in December after it became the subject of a supply chain cyberattack that affected 18,000 of its customers; eventually it was revealed that a much smaller number were compromised, totaling about 100 private companies and nine US government agencies. US intelligence released a joint statement in January naming Russia as the most likely source of the hack. The following month, Reuters reported that suspected Chinese hackers had exploited a separate flaw in SolarWinds' software to to help breach US government computers last year. The latest vulnerability is not related to the so-called Sunburst supply chain attack, SolarWinds said. Correction, 3:30PM ET : This article originally stated that the supply chain cyberattack compromised 18,000 SolarWinds customers. While 18,000 companies could have been affected, a much smaller number were actually impacted and compromised by "follow-on" activity on their system.