Our field of expertise is very dynamic and always changing. It demands professional penetration testers or ethical hackers to be aware and keep abreast of new technologies, trends, attacks, and vulnerabilities.
There is no excuse for a penetration tester who checks an infrastructure against attacks during the time of Windows 95 and does not assess the possibility of launching an attack on a newly discovered vulnerability that is breaking networks or applications all over the world at the same time.
Important information types and news for staying up-to-date and competent in our profession are:
Information on new vulnerabilities, new attack types, and scenarios
News about changes in the existing or new technologies, protocols, standards, and information security-related laws
News about big compromises and data breaches in the corporate world
Security reports and whitepapers
Security research results
Various security newsfeeds...