A few years ago, cybersecurity was a footnote in technology due diligence. Today, it is one of the first things serious acquirers examine — and one of the fastest-growing reasons deals are restructured, delayed, or killed entirely.
If you are evaluating a technology or SaaS acquisition, understanding the target’s cybersecurity posture is no longer optional. It is a dealbreaker.
Why Cybersecurity Has Moved to the Top of the Due Diligence Agenda
The threat landscape has changed dramatically. Ransomware attacks, data breaches, and supply chain vulnerabilities have become routine headlines — and the financial consequences are severe. The average cost of a data breach globally now exceeds $4 million, and that figure excludes reputational damage, customer churn, and regulatory fines.
For acquirers, the risk is compounded by timing. A breach that occurs six months post-close becomes your breach. A compliance gap that existed before signing becomes your liability. A vulnerability that was known but undisclosed can unwind indemnities and trigger legal disputes.
The question is no longer whether cyber risk matters in M&A. It is whether you are assessing it thoroughly enough before you commit.
What Cybersecurity Due Diligence Actually Covers
Effective cybersecurity due diligence goes well beyond asking whether the target has antivirus software. A rigorous assessment examines five core areas:
1. Security certifications and compliance
Does the company hold relevant certifications such as ISO 27001, SOC 2, or Cyber Essentials? Certifications are not a guarantee of security, but their absence — particularly in a business handling sensitive customer data — is a significant red flag. Equally important is understanding which compliance frameworks apply to the business and whether it is genuinely meeting them.
2. Access controls and identity management
Who has access to what? Weak identity and access management is one of the most common vulnerabilities found during technology due diligence. Key questions include whether multi-factor authentication (MFA) is enforced, whether privileged access is tightly controlled, and whether former employees are promptly offboarded.
3. Vulnerability and patch management
Is the company actively monitoring for vulnerabilities and applying patches in a timely manner? Unpatched systems — particularly public-facing ones — are among the most exploited attack vectors. A backlog of known, unaddressed vulnerabilities is a serious concern for any acquirer.
4. Incident history and response capability
Has the company experienced security incidents? How were they handled? A clean incident history is reassuring but rare. What matters most is whether the organisation has a documented incident response plan, whether it has been tested, and whether past incidents were disclosed appropriately and resolved thoroughly.
5. Third-party and supply chain risk
Modern software platforms rely heavily on third-party libraries, cloud providers, and SaaS integrations. Each of these represents a potential attack surface. Due diligence should map the target’s third-party dependencies and assess how vendor risk is managed.
The Valuation Impact of Cyber Risk
Cybersecurity findings do not just flag risks — they move numbers. Material vulnerabilities discovered during due diligence regularly result in price adjustments, escrow arrangements, or specific indemnities protecting the acquirer against post-close incidents linked to pre-existing gaps.
In some cases, the findings are severe enough to pause or terminate a transaction altogether. A target with an unresolved breach, a history of regulatory non-compliance, or a fundamentally insecure architecture represents a risk profile that no amount of discounting can fully mitigate.
Don’t Rely on Self-Reported Security Posture
Perhaps the most important point: self-reported cybersecurity assessments are rarely sufficient. Founders naturally present their security posture in the best possible light, and internal teams may lack the perspective to identify their own blind spots.
Independent, expert-led cybersecurity due diligence — conducted by specialists with direct access to systems, documentation, and architecture — is the only reliable way to understand what you are actually acquiring.
How VeryDiligent Approaches Cybersecurity Due Diligence
At VeryDiligent, cybersecurity assessment is an integral part of every technology due diligence engagement. Our team examines security posture, compliance gaps, vulnerability history, access controls, and third-party risk — producing findings that are actionable, clearly prioritised, and directly relevant to deal structuring.
Whether you are a private equity firm, a venture capital investor, or a strategic acquirer, we give you the technical clarity you need before you sign.
Contact us today to discuss your upcoming transaction.
Related reading: How to Evaluate a SaaS Architecture Before Acquisition | Technology Due Diligence Report: What to Include & Why It Matters