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VDR glossary · Due diligence

What is cybersecurity due diligence?

Definition

Cybersecurity due diligence: An assessment of a target's security posture, incident history and exposure to cyber risk, used by a buyer to price risk, plan remediation and decide on contract protections before closing.

How it works in a data room

The buyer requests security policies, audit reports, recent penetration test results, incident logs, insurance policies and details of third-party access. Because some of this material could help an attacker, sellers often place it in a restricted folder, share summaries rather than full reports or offer review in a secure viewer without download. Buyers may also run outside-in scans of the target’s public footprint and hold interviews with the security team.

Why it matters in a deal

A breach that started before closing becomes the buyer’s problem after it. Undisclosed incidents, weak access controls or unsupported systems can lead to regulatory fines, customer losses and expensive fixes. Findings feed into specific warranties, indemnities, price adjustments and the integration plan. Insurers underwriting warranty and indemnity insurance increasingly ask what cyber diligence was done.

Example

During the purchase of a payments startup, the buyer’s advisers find that former contractors still hold active administrator accounts and that a credential leak two years earlier was never reported. The parties agree a specific indemnity for that incident and a pre-closing clean-up of access rights. The technology and software guide covers tech target rooms.

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