Increased reliance on a narrow set of software components and third-party technology providers is creating systemic cybersecurity risks for Nigerian institutions. When multiple sectors—including government, finance, and telecommunications—depend on the same vendors, a single vulnerability can cause industry-wide disruption. Experts warn that organizations must move beyond viewing vulnerability management as an individual internal task. Instead, leaders are urged to prioritize vendor diversification, maintain rigorous asset inventories, and enhance transparency regarding third-party software dependencies. This shift aligns with global standards like the EU’s Digital Operational Resilience Act, emphasizing that national digital resilience requires proactive mapping of shared infrastructure risks.