Cybersecurity agencies from Australia, Canada, Germany, Japan, New Zealand, South Korea, the U.K., and the U.S. have issued a joint advisory about the China-linked cyber espionage group APT40, warning of its ability to exploit new security vulnerabilities within hours or days of their public release. APT40, also known by various aliases such as Bronze Mohawk, Gingham Typhoon, ISLANDDREAMS, Kryptonite Panda, Leviathan, Red Ladon, TA423, and TEMP.Periscope, has been active since at least 2013, primarily targeting organizations in the Asia-Pacific region.