The 50-Point Vendor Security Assessment Checklist

Enterprise procurement teams reject SaaS vendors over incomplete security evidence more than any other factor. According to SaaSFort scan data across hundreds of vendor assessments, 62% of deal delays stem from missing or outdated answers to standard security questionnaires. This checklist covers the 50 most common questions organized by category, with guidance on what enterprise buyers actually expect for each.

Use it to build your response library before the DDQ arrives. Pair it with continuous security monitoring to keep evidence current between assessments.

Infrastructure Security (1–10)

Infrastructure questions test whether your production environment meets baseline enterprise standards. Buyers care about this category first because a weak foundation invalidates everything built on top of it. Gartner reports that 75% of security failures trace back to inadequate infrastructure controls rather than application-level flaws.

1. Do you use encrypted connections (TLS 1.2+) for all data in transit?
2. Is data encrypted at rest using AES-256 or equivalent?
3. Do you maintain a network architecture diagram?
4. Are production environments isolated from development?
5. Do you use a WAF (Web Application Firewall)?
6. Is your infrastructure hosted in SOC 2 certified data centers?
7. Do you have DDoS protection in place?
8. Are backups encrypted and tested regularly?
9. Do you support data residency requirements (EU, US)?
10. Is your DNS configured with DNSSEC?

What enterprise buyers expect

Question 1 (TLS): Buyers run automated checks against your domains. TLS 1.2 is the minimum; TLS 1.3 support signals a modern stack. Weak cipher suites or expired certificates are instant red flags — these are the first things a security evidence package should cover.

Question 4 (Environment isolation): Procurement teams expect documented proof that production, staging, and development environments run on separate infrastructure with no shared credentials. A network architecture diagram (Question 3) should make this separation visually clear.

Question 6 (SOC 2 data centers): If you host on AWS, GCP, or Azure, this is a given. Self-hosted vendors need to name the facility and provide the data center’s own SOC 2 report. See our SOC 2 Type II readiness guide for what to prepare.

Application Security (11–20)

Application security is where deals are won or lost. According to SaaSFort data, 41% of SaaS vendors fail at least one OWASP Top 10 check on their first scan. Enterprise TPRM teams know this, which is why application security questions are the most scrutinized section of any DDQ.

11. Do you perform regular vulnerability scans?
12. Do you follow the OWASP Top 10 guidelines?
13. Is there a secure software development lifecycle (SSDLC)?
14. Do you conduct penetration testing at least annually?
15. Are security findings tracked and remediated with SLAs?
16. Do you have a bug bounty or vulnerability disclosure program?
17. Are all dependencies scanned for known vulnerabilities?
18. Do you use static and dynamic application security testing? (See our web application security testing guide for DAST vs SAST details)
19. Is input validation enforced on all user inputs?
20. Are API endpoints authenticated and rate-limited?

What enterprise buyers expect

Question 12 (OWASP Top 10): A “yes” without evidence is worthless. Buyers expect scan results proving you test against the current OWASP Top 10 — not just a policy document claiming you follow it. Continuous scan evidence dated within 30 days carries far more weight than an annual pen test report from 10 months ago.

Question 14 (Penetration testing): Annual pen tests remain the industry standard, but procurement teams increasingly ask for the remediation timeline too. They want to see that critical findings were patched within 72 hours, not added to a backlog. For vendors under €5M ARR, a combination of automated scanning and targeted manual testing is an accepted pen test alternative.

Question 15 (Remediation SLAs): The expected SLAs are: critical CVEs patched within 24 hours, high within 7 days, medium within 30 days. If your vulnerability management process cannot meet these timelines, see our vulnerability management guide for practical implementation steps.

Access Control (21–30)

Access control questions reveal how seriously a vendor treats the principle of least privilege. A 2025 Verizon DBIR finding showed that compromised credentials caused 44% of breaches involving web applications. Enterprise buyers use this section to assess whether your team’s access hygiene matches the product security you claim.

21. Do you support SSO (SAML, OIDC)?
22. Is multi-factor authentication enforced for admin access?
23. Do you follow the principle of least privilege?
24. Are access rights reviewed quarterly?
25. Is there role-based access control (RBAC)?
26. Do you have an offboarding process that revokes access?
27. Are API keys rotated regularly?
28. Do you support IP allowlisting?
29. Are admin actions logged and auditable?
30. Is there session management with timeout policies?

What enterprise buyers expect

Question 21 (SSO): SSO support is non-negotiable for enterprise deals above €50K ACV. Buyers expect SAML 2.0 and OIDC support with documented setup guides. Charging extra for SSO (“the SSO tax”) is increasingly seen as a deal friction point.

Question 22 (MFA): MFA must be enforced — not just available — for all accounts with admin or elevated privileges. Buyers verify this by requesting a screenshot of your MFA enforcement policy or checking during a live demo. For a deeper look at authentication risks, see our OAuth token security guide.

Question 29 (Audit logs): Enterprise security teams expect immutable audit logs with at least 12 months of retention. Logs must capture who did what, when, and from which IP. This is a zero trust architecture requirement that many vendors underestimate.

Compliance & Governance (31–40)

Compliance questions determine whether your security program is formalized or ad hoc. Regulated buyers in financial services, healthcare, and EU public sector cannot work with vendors who lack documented governance frameworks. With NIS2 enforcement in 2026 and Germany’s BSI IT-Grundschutz framework aligning directly to NIS2 Article 21, the compliance bar has risen significantly for any vendor selling into Europe.

31. Are you SOC 2 Type II certified (or in progress)?
32. Are you ISO 27001 certified?
33. Do you comply with GDPR?
34. Do you have a Data Processing Agreement (DPA)?
35. Is there a formal information security policy?
36. Do you conduct regular security awareness training?
37. Do you have a risk management framework?
38. Are third-party vendors assessed for security?
39. Do you maintain a data classification policy?
40. Is there a formal change management process?

What enterprise buyers expect

Question 31 (SOC 2): SOC 2 Type II is the single most requested certification in enterprise procurement. According to SaaSFort analysis, vendors with SOC 2 close enterprise deals 3x faster than those without. If certification is in progress, buyers expect a timeline and a bridge letter from your auditor. Read the detailed comparison in SOC 2 vs OWASP.

Question 33 (GDPR): A checkbox answer is insufficient. Buyers expect a published privacy policy, a DPA ready to sign, documented sub-processor lists, and proof of data subject request handling. GDPR compliance is table stakes for EU deals — the real differentiator is how quickly you can provide the supporting evidence.

Question 38 (Third-party assessment): Enterprise buyers want to know that you assess your own vendors. This creates a chain-of-trust requirement. Document your third-party risk management process including how frequently you reassess sub-processors and what criteria trigger a review.

Incident Response (41–50)

Incident response readiness separates mature vendors from the rest. Enterprise buyers know that breaches happen — what they evaluate is whether you can detect, contain, and communicate effectively when they do. A documented, tested incident response plan is the minimum. ENISA data shows that organizations with tested IR plans reduce breach costs by 58% on average.

41. Do you have a documented incident response plan?
42. Is there a 24/7 security monitoring capability?
43. What is your notification timeline for security incidents?
44. Do you conduct post-incident reviews?
45. Is there a disaster recovery plan with defined RTOs?
46. Do you maintain business continuity procedures?
47. Are incident response procedures tested annually?
48. Do you have cyber insurance?
49. Is there a designated security team or officer?
50. Can you provide evidence of your last security audit?

What enterprise buyers expect

Question 43 (Notification timeline): Most enterprise contracts require notification within 72 hours (aligned with GDPR Article 33). Regulated buyers in financial services often demand 24-hour notification. State your timeline explicitly in your DDQ response — vague answers like “as soon as possible” fail reviews.

Question 45 (Disaster recovery): Buyers expect documented RTOs (Recovery Time Objectives) and RPOs (Recovery Point Objectives) with evidence of DR testing. A common benchmark is RTO under 4 hours and RPO under 1 hour for critical SaaS services.

Question 50 (Audit evidence): This is the catch-all question. Buyers want a recent (within 12 months) third-party audit report, pen test summary, or continuous scan evidence. Stale evidence is the number one reason vendors fail assessments, as we detail in our enterprise deal security evidence guide.

Scoring Your Vendor Assessment

Not all 50 questions carry equal weight. Enterprise TPRM teams internally categorize their requirements into tiers. Understanding this prioritization helps you allocate preparation effort where it matters most.

Critical (must-pass)

Failure on any of these is a deal-blocker. No exceptions, no workarounds.

• Encryption in transit and at rest (Questions 1–2) — Non-negotiable baseline
• MFA for admin access (Question 22) — Required by every major compliance framework
• Incident response plan (Question 41) — Must exist and be documented
• SOC 2 or equivalent certification (Question 31) — Or a credible path to it
• GDPR compliance with DPA (Questions 33–34) — Required for any EU buyer
• Vulnerability management with SLAs (Question 15) — Must demonstrate remediation discipline

Important (strongly preferred)

Missing these raises concerns and may require compensating controls or executive approval to proceed.

• SSO support (Question 21)
• Annual penetration testing (Question 14)
• 24/7 monitoring (Question 42)
• Formal SSDLC (Question 13)
• Disaster recovery with defined RTOs (Question 45)
• Access reviews and RBAC (Questions 24–25)

Nice-to-have (differentiators)

These won’t block a deal, but they signal maturity and can tip competitive evaluations.

• Bug bounty program (Question 16)
• DNSSEC (Question 10)
• Cyber insurance (Question 48)
• IP allowlisting (Question 28)
• ISO 27001 on top of SOC 2 (Question 32)

Manual Assessment vs. Automated with SaaSFort

Dimension	Manual Approach	Automated with SaaSFort
Time to complete DDQ	2–4 weeks (first time)	2–3 hours
Evidence freshness	Point-in-time (often 6–12 months old)	Continuous (scanned within 24 hours)
Coverage	Depends on team knowledge	66 checks across OWASP, TLS, headers, DNS, compliance signals
Evidence format	Screenshots, PDFs, manual exports	Structured Deal Reports with scan timestamps
Repeatability	Starts from scratch each quarter	Automated re-scans with delta tracking
Cost per assessment	20–40 hours of engineering time	Included in SaaSFort subscription
Buyer confidence	Relies on self-attestation	Third-party verified scan results

SaaSFort generates Deal Reports that pre-answer questions 11–20 with real scan data, and provides supporting evidence for questions 1–10 through TLS audit, security header verification, and DNS security checks. The result: weeks of manual evidence gathering compressed into hours. For the complete automation approach, see our guide on automating security questionnaire responses.

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Frequently Asked Questions

How long does it take to complete a vendor security assessment?

For a typical 50–100 question DDQ, first-time completion takes 2–4 weeks without preparation. With a pre-built response library and continuous scan evidence, response time drops to 2–3 hours. The key is building a master knowledge base once and maintaining it quarterly. See our guide on automating security questionnaire responses for a practical automation roadmap.

Which security certifications matter most for vendor assessments?

SOC 2 Type II and ISO 27001 carry the highest weight in enterprise TPRM reviews. However, many procurement teams accept a combination of OWASP scan evidence, written security policies, and a recent pen test report as an alternative — especially for vendors under €5M ARR. For a detailed framework comparison, see SOC 2 vs OWASP and our ISO 27001 certification guide.

What are the most common reasons SaaS vendors fail security assessments?

The top 3 failure reasons are: outdated security evidence (pen test reports older than 12 months), missing sub-processor documentation, and vague answers about vulnerability management. Enterprise TPRM teams expect specific SLAs — critical CVEs patched within 24 hours, high within 7 days. For a comprehensive TPRM readiness checklist, see our dedicated guide.

How does NIS2 change vendor security assessments in 2026?

NIS2 Article 21(2)(d) requires regulated entities to assess supply chain security, adding explicit sections to vendor questionnaires. Enterprise buyers now include NIS2 compliance checklists as part of standard vendor assessments. The practical impact: DDQs are longer, evidence requirements are stricter, and re-assessment cycles are shorter (annual instead of contract-renewal-only).

Can SaaSFort automate answers to this checklist?

SaaSFort automates evidence generation for questions 11–20 (Application Security) with continuous OWASP Top 10 scanning, and provides supporting evidence for infrastructure security (questions 1–10) through TLS audit, security header verification, and DNS security checks. Deal Reports format these results for procurement teams. For the full questionnaire framework comparison, see our security questionnaire template guide.

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Related Reading

• SMB Security Checklist: 10 Things to Check in 2026 — simplified version for small businesses starting their security journey
• Cloud Security Posture Management (CSPM) for SaaS Vendors — extend this checklist to your cloud infrastructure layer
• AI Governance DDQ Response Guide — the new AI-specific sections now appearing in vendor assessments
• SOC2 Type II Readiness Guide — prepare the audit evidence buyers expect alongside this checklist

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For the complete framework covering all 50 questions and more, download The SaaS Security Playbook 2026 — a free guide that walks through every evidence domain enterprise buyers evaluate.

Ready to prepare your security evidence? Start your free scan and get audit-ready in hours, not weeks. Download the complete assessment framework in our SaaS Security Playbook 2026.