This opinion piece discusses the evolving nature of disinformation in the context of cybersecurity, particularly with the advancements in artificial intelligence (AI). It presents the argument that disinformation should be considered a significant cyber threat due to its increasing sophistication and potential for widespread impact. The document outlines how adversaries utilize generative AI techniques to create more convincing disinformation, making it harder to detect. It also highlights the historical context of disinformation and its transformation into what is termed 'disinformation 2.0', where the content becomes indistinguishable from genuine information. The authors advocate for a layered approach to countermeasures, drawing parallels with traditional cybersecurity strategies. This includes a combination of human-oriented and technical measures aimed at reducing the impact of disinformation across various levels, such as social networks and user actions. The piece emphasizes the necessity for effective strategies to combat this evolving threat to ensure the integrity of information in both digital and real-world contexts.