Transcriptional activator that binds specifically to the DNA sequence 5'-[AG]CCGAC-3'. Binding to the C-repeat/DRE element mediates cold-inducible transcription. CBF/DREB1 factors play a key role in freezing tolerance and cold acclimation. Interacts with 14-3-3 proteins GRF1, GRF3, GRF5, GRF6, GRF7, GRF9 and GRF10 in the nucleus upon freezing. By cold stress (PubMed:9735350). Subject to degradation by the 26S proteasome pathway in freezing conditions (PubMed:28344081). Belongs to the AP2/ERF transcription factor family. ERF subfamily.