Final answer:
The statement is false as human errors, even when accidental, can pose serious security threats to information systems, as demonstrated by the research on cognitive load leading to misidentification of threats and the Target data breach of 2013.
Step-by-step explanation:
The statement that problems caused by human errors are accidental and not malicious, and therefore are not considered as security threats to the information system is FALSE. Human errors can indeed pose significant security threats to information systems, even if they are accidental. The research by Bruno & Abrahão (2012) highlights how increased cognitive load in operators can lead to more frequent misidentification of security incidents, which in turn could lead to serious security breaches. This was evident in the fall of 2013 when Target experienced a massive data breach partly due to security personnel incorrectly interpreting signals of a breach.