Chinese hackers breached the U.S. National Nuclear Security Administration through Microsoft SharePoint, with the Energy Department confirming no sensitive information was stolen.

Hackers are now using AI to scale attacks, exploit vulnerabilities more quickly and create deceptive content that’s nearly undetectable with traditional defenses.

Hackers exploited a security flaw in common Microsoft Corp. software to breach governments, businesses and other organizations across the globe and steal sensitive information, according to officials and cybersecurity researchers.

Hackers sponsored by the Chinese state have breached a number of U.S. government institutions, including the agency responsible for overseeing the security of America’s nuclear arsenal, Microsoft warned.

Hackers are exploiting a flaw in a commonly used Microsoft program to gain access to passwords, sensitive data and more.

Newly published research shows that the domain name system—a fundamental part of the web—can be exploited to hide malicious code and prompt injection attacks against chatbots.

Melissa Stombaugh is fed up with Facebook after hackers reportedly took over her account. Posing as her, they posted messages claiming she had to put her father in assisted living.

Arizona officials have “moderate confidence” that the Iranian government or affiliates breached the state’s candidate web portal.

A cyber-espionage campaign centered on vulnerable versions of Microsoft's server software now involves the deployment of ransomware, Microsoft said in a late Wednesday blog post.