(Credit: Shutterstock) UPDATE: The hack also sent malicious computer code to Microsoft. However, the company says it neutralized the infection before any major damage was done. Original story: On Thursday, Politicoreported the hackers broke into the US Energy Department and National Nuclear Security Administration, which maintains the country's nuclear weapons stockpile. However, it remains unclear what the culprits might have accessed. On the same day, the cybersecurity division under the Department of Homeland Security warned the massive breach was pulled off using a variety of tactics. “CISA has evidence of additional initial access vectors, other than the SolarWinds Orion platform; however, these are still being investigated,” the Cybersecurity and Infrastructure Security Agency said in the alert.