In climate action: the degree to which a system is susceptible to, or unable to cope with, adverse effects of climate change, including climate variability and extreme climate events. Vulnerability is a function of the character, magnitude, and rate of climate change and variation to which a system is exposed, its sensitivity, and its adaptive capacity [Section 3(r), Climate Change Act of 2009, as amended by Republic Act No. 10174; Section 1(bb), Climate Change Commission Resolution No. 3, Revised Implementing Rules and Regulations (R-IRR) of Republic Act No. 9729, Otherwise Known as the Climate Change Act of 2009, As Amended By Republic Act No. 10174]
Note: Under the IRR, an editorial change, “the”, is inserted before “adverse effects”.
In energy and cybersecurity: the weakness of an asset or control that can be exploited by one or more threats (NCSP 2023-2028) [Section 3(ff), DOE Department Circular No. DC2025-01-001, Institutionalizing the Energy Sector Cybersecurity and Cyber Resilience Framework]