Chinese Hacking Spree Hit an ‘Astronomical’ Number of Victims By Andy Greenberg Published: 2021-03-05 · Archived: 2026-04-05 14:01:06 UTC A single group appears to have infiltrated tens of thousands of Microsoft Exchange servers in an ongoing onslaught. Photograph: David Paul Morris/Bloomberg/Getty Images All products featured on WIRED are independently selected by our editors. However, we may receive compensation from retailers and/or from purchases of products through these links. Learn more. When news hit earlier this week that Chinese hackers were actively targeting Microsoft Exchange servers, the cybersecurity community warned that the zero-day vulnerabilities they were exploiting might have allowed them to hit countless organizations around the world. Now it's becoming clear just many email servers they hacked. By all appearances, the group known as Hafnium breached as many victims they could find across the global internet, leaving behind backdoors to return to later. You’ve read your last free article. https://www.wired.com/story/china-microsoft-exchange-server-hack-victims/ Page 1 of 3 The intersection of technology, power, and culture. Start your free trial and get access to 5 all-new premium newsletters—cancel anytime. START FREE TRIAL Already a subscriber? Sign In The intersection of technology, power, and culture. Start your free trial and get access to 5 all-new premium newsletters START FREE TRIAL https://www.wired.com/story/china-microsoft-exchange-server-hack-victims/ Page 2 of 3 Andy Greenberg is a senior writer for WIRED covering hacking, cybersecurity, and surveillance. He’s the author of the books Tracers in the Dark: The Global Hunt for the Crime Lords of Cryptocurrency and Sandworm: A New Era of Cyberwar and the Hunt for the Kremlin's Most Dangerous Hackers. His books ... Read More Don't Just Keep Up. Get Ahead Sign up for the Daily newsletter to get our biggest stories, handpicked for you each day. Source: https://www.wired.com/story/china-microsoft-exchange-server-hack-victims/ https://www.wired.com/story/china-microsoft-exchange-server-hack-victims/ Page 3 of 3