Microsoft server hack has compromised 400 organizations, researchers say

WASHINGTON (Reuters) -About 400 organizations show signs of having been compromised following the discovery of a sweeping cyberespionage operation centered on Microsoft’s server software, according to researchers at Netherlands-based Eye Security.

The figure compares to 100 organizations cataloged over the weekend. Eye Security says the figure is likely an undercount.

(Reporting by Raphael Satter; Editing by Jan Harvey)