(Subscribe to our Today's Cache newsletter for a quick snapshot of top 5 tech stories. Clickto subscribe for free.)Microsoft Exchange Server vulnerabilities are being exploited by more than 10 different advanced persistent threat (APT) groups to compromise email servers of various organisations, according to researchers at cybersecurity firm ESET.The anti-virus software maker said threat actors potentially used Microsoft’s mail server flaws to install malware like web shells and gain backdoor entry into victims’ email servers. It has identified the presence of web shells on more than 5,000...…(Subscribe to our Today's Cache newsletter for a quick snapshot of top 5 tech stories. Clickto subscribe for free.)Microsoft Exchange Server vulnerabilities are being exploited by more than 10 different advanced persistent threat (APT) groups to compromise email servers of various organisations, according to researchers at cybersecurity firm ESET.The anti-virus software maker said threat actors potentially used Microsoft’s mail server flaws to install malware like web shells and gain backdoor entry into victims’ email servers. It has identified the presence of web shells on more than 5,000...WW…