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1) Attackers, believed to be Russia-based, are leveraging a Windows feature to send malicious Office documents.
2) Some anti-virus programs may cause more harm than good.
3) A coding mistake found in hundreds of apps with messaging capabilities could open tens of millions of smartphone users to eavesdropping.
4) Cyberattacks launched by hostile nations would be an "act of war," according to a European Union draft policy.
5) Passwords exposed via phishing or keylogging are far more likely to be abused for longer than ones disclosed via data breaches.