In M&A cybersecurity due diligence, the most dangerous finding is not always an unpatched firewall, a missing SOC 2 report, or an overdue policy review. The larger risk is often a false sense of assurance created by questionnaires that never test whether controls actually operate under stress. A third-party risk audit should therefore answer a deal question: will this target, vendor, or portfolio company introduce material cyber exposure, regulatory liability, ransomware risk, or AI security risk after close?
That question has become urgent. Verizon reports that its 2026 Data Breach Investigations Report analyzed more than 22,000 confirmed breaches, found vulnerability exploitation in 31% of breaches with known initial access, ransomware in 48% of breaches, and third-party involvement in 48% of breaches Verizon, 2026 Data Breach Investigations Report. IBM also reports that enterprise security incidents increasingly involve AI models or applications, and identifies prompt injection, data poisoning, data leakage, model inversion, and shadow AI as AI workload threats IBM, What is AI Workload Security?.
Lazarus Alliance approaches M&A cybersecurity due diligence as an evidence-based GRC audit, not a paperwork exercise. The following 10 GRC checks help boards, private equity sponsors, CISOs, general counsel, compliance officers, and IT directors evaluate acquisition targets and critical vendors before cyber risk becomes enterprise risk.
