Welcome to F5 Labs’ third annual report on phishing and fraud. Once again, we’re bringing
you data from our partner Webroot as well as the F5 Security Operations Center.
Phishing continues to be a major source of profit for cyber-criminals, and a big hassle for
cyber-defenders. In the F5 Labs 2019 Application Protection Report, F5 Labs found that
phishing was responsible for 21% of breaches, the second largest cause of breach reported
by U.S. companies. The number one reported breach cause (absent other details) was
unauthorized access to email. Because phishing can commonly grant unauthorized access to
email, it’s likely phishing is also the cause of some of these breaches. So there you have it:
one of the most prevalent ways attackers are breaching data is via phishing.