The Department of Justice used a court order to dismantle 'hundreds' of web shells installed using Exchange Server vulnerabilities. (Photo by Roy Rochlin/Getty Images for Leaders)

In an unprecedented move, the Department of Justice used a court order to dismantle 'hundreds' of web shells installed using Exchange Server vulnerabilities patched by Microsoft six weeks ago.

Microsoft claimed a state-sponsored group located in China that it dubbed Hafnium actively exploited the vulnerabilities at the time of the patch.

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