An information security survey was conducted among the top 100 companies in Russia in 2014. The survey found that all companies experienced information security incidents in 2013, with 58% affecting internal infrastructure availability. The most common threats were vulnerabilities allowing network perimeter hacking in 2 steps, with 82% of attacks being successful despite low attacker qualification. Unpatched software left 57% of systems vulnerable to critical vulnerabilities, and some updates took as long as 9 years to install.