Discontinuation is the decision to stop selling or actively developing a product line. In cybersecurity, it matters because a product that is no longer maintained may also stop receiving security fixes, feature updates, or compatibility testing. That can turn an otherwise normal device or application into a long-term risk.
Attackers often look for discontinued products because they are more likely to have known but unpatched vulnerabilities, weak default settings, or unsupported components. Defenders treat discontinuation as a lifecycle signal: they inventory affected assets, check vendor support and patch timelines, and plan migration before the product becomes exposed. Good asset management reduces the chance that an old router, tablet, server, or app remains in service after its safe maintenance window has closed.