20 Common Vendor Security Questionnaire Questions (And How to Answer Them)

What Is a Vendor Security Questionnaire?

A vendor security questionnaire is a structured set of questions that enterprise buyers send to software vendors and service providers before onboarding them, to assess the vendor’s information security practices, data handling policies, and compliance posture. Security questionnaires are one of the primary instruments of Third-Party Risk Management (TPRM) — the discipline through which organizations verify that the vendors they rely on meet a minimum security standard.

The questions in these assessments tend to cluster around the same topics regardless of which company or framework they come from: access controls, data encryption, incident response, compliance certifications, business continuity, and third-party risk management. This article covers the 20 most common ones, explains what evaluators are genuinely trying to understand with each question, and provides model answer examples you can adapt for your own organization.

📌 TL;DR
• Security questionnaires ask the same ~20 questions in different forms — knowing the intent helps you answer more credibly
• Strong answers are specific, evidence-backed, and reference real controls — not generic assertions
• Evaluators want maturity and honesty, not perfection
• Build a pre-approved answer library — most of these will appear in every questionnaire you receive

What Evaluators Are Really Looking For

The security analyst reading your answers is not looking for a perfect security program. They are assessing whether your organization is aware of its risks, has implemented appropriate controls, and can demonstrate those controls with evidence rather than assertions. The most common failure mode is vagueness — answers like “We take security seriously and have implemented industry best practices” communicate nothing verifiable. The second failure mode is overconfidence: claiming SOC 2 compliance when still in readiness, or describing DR capability that has never been tested, creates legal exposure and damages credibility when follow-up evidence requests arrive.

Weak vs. Strong Answer Patterns

Category 1: Access Control

Access control questions are almost always the first section. Evaluators want to understand who can access what, how access is granted and revoked, and what technical controls enforce those policies. Unauthorized access is the most common initial breach vector, which is why this category receives the most scrutiny.

Question 1: Does your organization enforce MFA on all systems that access customer data? What the evaluator is asking: whether MFA is a genuine operational control with no exceptions for privileged accounts. Model answer: “Yes. MFA is enforced for all access to production systems, customer data environments, and administrative interfaces via Okta. Mandatory with no exceptions for privileged accounts, and required for all remote VPN access.”

Question 2: How do you manage user access provisioning and de-provisioning? What the evaluator is asking: whether access is role-based and revoked promptly when employees leave. Stale access is a persistent vulnerability. Model answer: “Access is provisioned through Okta based on a defined role matrix. New requests require manager approval and are logged. Access is revoked within 24 hours of offboarding. Quarterly access reviews identify and remove any access no longer required.”

Question 3: Do you perform regular access reviews for privileged accounts? What the evaluator is asking: whether elevated permissions are actively managed rather than accumulated. Model answer: “Privileged accounts are reviewed quarterly by the Head of Security. Accounts no longer required are revoked immediately. Privileged production access requires just-in-time approval and is fully logged.”

Category 2: Data Security and Encryption

Data security questions focus on how customer data is stored, transmitted, and protected. These questions are particularly important for buyers in regulated industries where data handling requirements are legally defined.

Question 4: How is customer data encrypted at rest and in transit? What the evaluator is asking: specific encryption standards. Many evaluators have explicit thresholds (AES-256 at rest, TLS 1.2+ in transit) and will flag responses that fall short. Model answer: “All customer data encrypted at rest using AES-256 via AWS KMS. All data in transit encrypted using TLS 1.2 or higher — TLS 1.0 and 1.1 are disabled. Database backups encrypted with the same standard in encrypted S3 buckets.”

Question 5: Where is customer data stored, and do you support data residency? What the evaluator is asking: geographic regions for data storage and whether jurisdiction-specific confinement is possible. Model answer: “EU customers hosted in AWS EU-West-1 (Ireland) and EU-Central-1 (Frankfurt); US customers in US-East-1 (Virginia). Enterprise contracts support customer-specific data residency. EU data is not transferred outside the EEA without GDPR-compliant safeguards.”

Question 6: What is your data retention and deletion policy? What the evaluator is asking: how long data is held after contract end and whether deletion is enforceable. Model answer: “Data retained for contract duration plus 30 days for export. After 30 days, permanently deleted from production and backups per our deletion procedure. Deletion logged; certificate available on request.”

Category 3: Incident Response

Incident response questions evaluate your plan for when something goes wrong. Evaluators focus on detection capability, response timelines, and breach notification procedures, which carry legal implications under GDPR, HIPAA, and enterprise contracts.

Question 7: Do you have a documented incident response plan? What the evaluator is asking: whether incident response is formalized and rehearsed. Model answer: “Yes. Our IRP covers detection, containment, eradication, recovery, and post-incident review. Reviewed annually; tested through tabletop exercises twice per year. Responsibilities assigned to named team members; 24/7 on-call rotation maintained for critical events.”

Question 8: What is your process for notifying customers of a security breach? What the evaluator is asking: your legally compliant notification timeline. GDPR requires 72 hours; many enterprise contracts require less. Model answer: “Affected customers notified within 72 hours of confirmation per GDPR Article 33. Notification includes breach nature, data categories affected, likely consequences, and measures taken. A dedicated security contact is available 24/7 for escalation.”

Question 9: How do you detect security incidents and anomalous activity? What the evaluator is asking: whether detection is automated. Absence of automated detection is a significant risk signal. Model answer: “We use AWS GuardDuty, CloudTrail, and Datadog SIEM for continuous monitoring. Alerts route to our security team with defined escalation thresholds. All production API calls, authentication events, and admin actions are logged and retained for 12 months.”

Category 4: Compliance and Certifications

Compliance questions ask what certifications you hold and what standards you follow. The most common errors are overclaiming scope or recency. Evaluators pay close attention to report dates — a SOC 2 report more than 12 months old is often treated as lapsed.

Question 10: Do you hold a SOC 2 report? Type and report period? Model answer: “SOC 2 Type II covering Security and Availability Trust Service Criteria, period January 1 – December 31, 2025, issued by [Audit Firm] in February 2026. Available under NDA.”

Question 11: Are you ISO 27001 certified? Model answer: “Yes. ISO/IEC 27001:2022 certification issued by [Body], valid through [date], covering our cloud platform and support operations. Most recent surveillance audit completed [month, year]. Publicly verifiable on the certification body’s website.”

Question 12: How do you manage GDPR compliance? Model answer: “We act as data processor for customer personal data. We maintain ROPA per Article 30, have appointed a DPO, and offer a DPA incorporating EU SCCs for all customers. Available on our website.”

Category 5: Business Continuity and Disaster Recovery

Business continuity questions evaluate your resilience. Evaluators want specific, tested metrics rather than aspirational targets that exist only in documentation.

Question 13: What are your RTO and RPO? Model answer: “Standard tier: RTO 4 hours, RPO 1 hour. Enterprise SLA: RTO 1 hour, RPO 15 minutes. Targets tested in full DR exercises twice per year.”

Question 14: How frequently do you test your disaster recovery plan? Model answer: “Full DR tests twice per year including simulated production failover. Tabletop exercises quarterly. Results documented, reviewed by Head of Security, and used to update the DR plan where gaps are found.”

Category 6: Third-Party and Supply Chain Risk

Third-party risk questions have expanded significantly as buyers recognize that vendor risk extends through supply chains. These questions evaluate how you manage the security of your own subprocessors and technology partners.

Question 15: Who are your critical subprocessors, and how do you assess their security? Model answer: “Primary subprocessors: AWS (infrastructure), Datadog (monitoring), Stripe (payments), Intercom (support). Full list maintained on our website, updated within 30 days of any change. Each assessed annually for SOC 2 or ISO 27001 certification.”

Question 16: Do you conduct penetration testing, and how often? Model answer: “Annual pen tests by an independent third party covering web application, API, and internal network. Critical and high findings remediated within 30 days. Continuous automated scanning via Snyk and AWS Inspector. Most recent report available under NDA.”

Question 17: How do you manage vulnerabilities in your software and dependencies? Model answer: “Snyk automated scanning in the CI/CD pipeline. Critical and high vulnerabilities block deployment until resolved. Mean time to remediate critical vulnerabilities: 6 days over the past 12 months.”

Category 7: Physical and Organizational Security

These questions address the human dimension of security: background checks, security training, and secure development practices. They are increasingly weighted in enterprise assessments as buyers recognize that technical controls are only as strong as the people operating them.

Question 18: Do employees with access to customer data undergo background checks? Model answer: “All employees and contractors with production or customer data access undergo background checks prior to engagement, including criminal record checks and employment history verification.”

Question 19: How do you train employees on information security? Model answer: “Security awareness training at onboarding and annually thereafter. Quarterly simulated phishing exercises. Role-specific training for engineers (secure coding) and support staff (data handling). Completion tracked and reported monthly to the Head of Security.”

Question 20: How do you ensure secure software development practices? Model answer: “Secure SDLC including threat modeling for new features, mandatory code review, automated SAST via Snyk Code in CI/CD, and dependency scanning before every release. Engineers complete annual secure coding training. Critical releases require senior security review before deployment.”

Building a Reusable Answer Library

The 20 questions above represent the core of what most security questionnaires will ask. Once your security team has reviewed and approved accurate answers to each, those answers become a reusable asset. The key to maintaining a useful library is keeping it current: when your SOC 2 report renews, update the compliance answers. When RTO/RPO targets change, update business continuity answers. When you add a subprocessor, update third-party risk answers. Treat the library as a living document reviewed quarterly alongside your security program.

A Note on Automating Security Questionnaire Responses

For teams handling a high volume of assessments, Steerlab.ai automates the drafting process by learning from your approved answer library and past submissions, so your security team focuses on reviewing and approving rather than writing from scratch every time.

Frequently Asked Questions

What are the most common vendor security questionnaire questions?

The most common questions cover access control (MFA, user provisioning, privileged access), data security (encryption, residency, retention), incident response (breach notification, detection), compliance (SOC 2, ISO 27001, GDPR), business continuity (RTO/RPO, DR testing), and third-party risk (subprocessors, pen testing, vulnerability management).

What is a security question in a vendor assessment?

A security question in a vendor assessment is a structured inquiry about a vendor’s information security controls, policies, and practices. Used by enterprise buyers to verify that vendors meet their security requirements before granting access to systems or data. Typically organized by domain and may require supporting evidence such as certifications or audit reports.

How do you answer a vendor security questionnaire?

Answer specifically, naming actual controls, tools, and certifications. Avoid generic assertions. Back claims with evidence where possible. Be honest about gaps or roadmap items. Have answers reviewed by your security team before submission to ensure accuracy and consistency across all submissions.

What makes a good security questionnaire answer?

Specific (names actual tools, standards, and processes), accurate (matches your current state), evidence-backed (references verifiable certifications or documentation), and appropriately scoped (explains what systems the control applies to). Avoids vague language like “industry best practices” without supporting detail.

How long does it take to complete a security questionnaire?

A 50–100 question questionnaire without a prepared answer library typically takes one to two weeks of cross-functional effort. With a maintained library of pre-approved answers, the same questionnaire can be completed in one to three days, primarily requiring adaptation and review.

What is the difference between a SIG and a CAIQ?

The SIG (Standardized Information Gathering) questionnaire, published by Shared Assessments, is used broadly across industries. The CAIQ (Consensus Assessments Initiative Questionnaire), published by the Cloud Security Alliance, is designed specifically for cloud service providers and is more technically focused on cloud architecture and controls.

Do you have to answer every question on a security questionnaire?

Yes. Unanswered questions are worse than qualified answers. If a control is not yet implemented, say so and note whether it is on your roadmap. If a question is not applicable, explain why explicitly. Evaluators treat unanswered questions as gaps or evasions, neither of which builds confidence.

How often do vendor security questionnaire questions change?

The core set is relatively stable. What evolves is depth and specificity, reflecting emerging threats and regulations. Questions about AI data usage, software supply chain security (SBOM), and data sovereignty are becoming more common in newer assessments. Following NIST CSF and Cloud Security Alliance publications helps teams anticipate new areas before they appear.