Anyone selling their company in 2026 no longer has just financial KPIs, contracts, and HR records in the data room. Cyber due diligence has become its own workstream – and has broken several deals over the past 24 months.
Why Buyers Look So Closely in 2026
Three drivers:
- Inherited cyber risks become your own. Whoever buys a company buys its unpatched servers, its compromised accounts, its open data breaches – and the liability for them.
- NIS-2 extends the obligations. Buyers in regulated sectors must ensure NIS-2 compliance of the target as well, immediately.
- Insurers reassess the combined risk. The cyber policy gets renegotiated post-acquisition – at the weaker standards of the target.
What the Typical 2026 Cyber DD Question Catalog Contains
- ISMS status: is one in place? Per which standard? Last audit date? Last findings?
- 36-month incident history: all security incidents, with damages, detection, response, lessons learned.
- Data protection incidents: reportable breaches with regulator correspondence, fines, open proceedings.
- Asset inventory: complete list with protection need, EOL status, cloud contracts, supplier registry.
- Identity hygiene: active accounts, deactivated accounts, MFA coverage, privileged access.
- Patch status: critical CVEs of the last 12 months, current patch state, mean patch latency.
- SIEM/EDR coverage: which endpoints, servers, cloud services are actually monitored?
- Incident Response Plan">Incident response plan: written, tested, when last?
- Supplier risks: TPRM status, Schrems II assessment, sub-processor lists.
- Compliance gaps: NIS-2, GDPR, sector-specific frameworks – status and roadmap.
The Three Findings That Kill Deals
From actual DD experience:
- Concealed incident: visible in the audit log or old emails, not disclosed by the seller. Trust break – deal pauses or fails.
- Data breach without regulator notification: but should have been notifiable. Buyer would step into the existing supervisory exchange – they don't want that.
- Severe identity debt: 30 % of accounts without MFA, 200 stale accounts of departed employees, 15 service accounts with default passwords. Buyer estimates 6–12 months of remediation – purchase price reduction or unwinding.
What an Integrated Platform Brings to the DD Process
With SecTepe.Core + SecTepe.Comm the DD questions are answerable in days instead of weeks:
- ISMS export: Statement of Applicability, Risk Register, control status as PDF/CSV.
- Incident history: from Wazuh + audit log, correctly timestamped, no cherry-picking suspicion.
- Asset inventory: complete, with protection need, lifecycle status, contract linkage.
- MFA/patch coverage: live reports, not just "as of last quarter".
- Supplier list: from the TPRM module with risk scores and latest reassessments.
- Trust center: many DD questions are already answered publicly – trust before the first meeting.
Valuation Effect: What the Buyer Pays for It
Studies from 2025 show: a target with documented ISMS, clean incident history, and low cyber debt receives on average a 5–8 % valuation premium. Conversely: severe cyber debt drives 15–25 % reduction or an earn-out tied to remediation milestones.
On a €50 M deal that's €2.5–4 M premium or €7.5–12.5 M discount. Cyber hygiene is the single lever that moves three-figure thousands of euros (platform + service) into three-figure thousands to millions on the purchase price.
What Management Should Do – At Least 12 Months Before the Exit
- Complete ISMS foundation – with external audit or pre-audit.
- Identity cleanup: MFA rollout, account lifecycle clean-up, revisit privileged access.
- Complete asset inventory, document EOL status cleanly.
- Set up supplier TPRM, top-10 with current assessments.
- Test the incident response plan, document the tabletop.
- Make the trust center public – signals maturity even before the first buyer meeting.
Conclusion
M&A cyber DD is no longer "also" in 2026, it's valuation-relevant. Anyone planning an exit in the next 24 months should treat the ISMS program as part of exit preparation – with the same urgency as accounting hygiene or contract typology. The financial effect is measurable and in nearly every case positive.