A suggestion for security pros: Don’t take your vacation in August. Indeed, a pattern has emerged in recent years in which attackers take a recently disclosed Microsoft flaw and exploit it in dramatic fashion, often in the first two weeks of the month. This year, security experts are sounding the alarm because of a critical Windows Server Service flaw that Microsoft addressed with its August patch release. By Sunday, attackers were targeting the Windows Server Services flaw with malware in a bid to expand their IRC-controlled botnets.