Critical. A vulnerability whose exploitation could allow code execution without user interaction. These scenarios include self-propagating malware (e.g. network worms), or unavoidable common use scenarios where code execution occurs without warnings or prompts. This could mean browsing to a web page or opening email.
A strain is a stretching or tearing of muscle or tendon. A tendon is a fibrous cord of tissue that connects muscles to bones. Strains often occur in the lower back and in the hamstring muscle in the back of your thigh. Initial treatment for both sprains and strains includes rest, ice, compression and elevation.
Strain may refer to:A situation where you tend to accomplish more than an expectation in a given period of time, 1  Strain (biology) , variants of plants, viruses or bacteria; or an inbred animal used for experimental purposes.2  Strain (chemistry) , a chemical stress of a molecule. Strain (injury) , an injury to a muscle in which the muscle fibers tear as a result of over-stretching. 2  Strain (manga) , a 1996 manga written by Yoshiyuki Okamura, and illustrated by Ryoichi Ikegami.