The glossary below contains many of the terms you will find in common use throughout the Symantec Security Response website. Please refer to this list to find definitions of terms and answers to other Internet security-related questions.


A rating that is used to calculate vulnerability based on the relative amount of time that has evolved since the discovery of the vulnerability. According to experts, the potential for exploitation of a vulnerability increases as the age of the vulnerability increases. This statement is supported by the assumption that more people are likely to know that the vulnerability exists. L-3 Network Security researchers assign lower ratings to the age factor of recently discovered vulnerabilities. Older vulnerabilities are rated higher.

In DeepSight, a timely notice of security information that may be critical to the defense and maintenance of an organization's technology resources and data assets.