Why Did My PCI Scan Fail?

If you’ve just received a failed PCI scan report, you’re probably feeling frustrated and maybe a little overwhelmed. Don’t worry – you’re not alone, and a failed scan doesn’t mean you’re in serious trouble. In fact, it’s simply pointing out security vulnerabilities that need your attention to keep your business and customers safe.

What You’ll Learn in This Guide

In this comprehensive guide, you’ll discover:

The most common reasons why PCI scans fail
How to interpret your scan results without getting lost in technical jargon
Step-by-step instructions to fix the issues and pass your next scan
How to prevent future scan failures
When it makes sense to handle fixes yourself versus hiring a professional

Why This Matters for Your Business

A failed PCI scan isn’t just a technical hiccup – it directly impacts your ability to process credit card payments safely and legally. Understanding why your scan failed and how to fix it protects your business from data breaches, hefty fines, and the loss of customer trust.

Who This Guide Is For

This guide is designed for business owners, IT managers, and anyone responsible for PCI compliance who may not have extensive cybersecurity experience. We’ll explain everything in plain English and give you practical steps you can follow.

The Basics: Understanding PCI Scans

What Is a PCI Scan?

A PCI scan, officially called an Approved Scanning Vendor (ASV) scan, is a security test that examines your business’s internet-facing systems for vulnerabilities. Think of it like a security inspection for your digital storefront – it checks for unlocked doors, broken windows, and other weak spots that hackers might exploit.

Key Terms You Need to Know

Vulnerability: A security weakness in your system that could potentially be exploited by cybercriminals.

ASV (Approved Scanning Vendor): A company certified by the PCI Security Standards Council to conduct these security scans.

IP Address: Your system’s unique internet address that the scanner examines.

Port: Think of ports as different doors into your system – some should be open for business, others should be locked tight.

SSL/TLS Certificate: Digital certificates that encrypt data between your website and customers’ browsers.

How PCI Scans Relate to Your Business

If your business accepts credit card payments and has an internet connection, you likely need to pass quarterly PCI scans. These scans are required for most businesses that fall under PCI DSS (Payment Card Industry Data Security Standard) compliance requirements.

The scan examines any systems that could potentially affect the security of cardholder data, even if they don’t directly process payments.

Why Passing Your PCI Scan Matters

Business Implications

Legal Requirement: PCI compliance isn’t optional – it’s mandated by credit card companies. A failed scan means you’re not meeting these requirements.

Payment Processing: Your merchant account provider may suspend your ability to process credit cards if you don’t maintain compliance.

Customer Trust: Customers expect their payment information to be secure. Compliance demonstrates your commitment to protecting their data.

Risk of Non-Compliance

Fines: Credit card companies can impose monthly fines ranging from $5,000 to $100,000 for non-compliance.

Increased Processing Fees: You may face higher transaction fees until you achieve compliance.

Liability: If a data breach occurs while you’re non-compliant, you could be held liable for all associated costs.

Reputation Damage: News of security issues can seriously harm your business reputation.

Benefits of Compliance

Peace of Mind: Knowing your systems are secure allows you to focus on running your business.

Competitive Advantage: Compliance can be a selling point when customers are choosing between vendors.

Reduced Breach Risk: Addressing vulnerabilities significantly lowers your risk of experiencing a costly data breach.

Step-by-Step Guide to Understanding and Fixing Scan Failures

Step 1: Get Your Scan Report (Timeline: 10 minutes)

Request your detailed scan report from your ASV. This document contains specific information about each vulnerability found. Don’t panic when you see technical terms – we’ll help you understand them.

Step 2: Identify the Most Critical Issues (Timeline: 30 minutes)

Scan reports typically categorize vulnerabilities by severity:

Critical: Address these immediately
High: Fix within a few days
Medium: Address within a week or two
Low: Can be scheduled for later

Start with critical and high-priority items first.

Step 3: Understand Common Failure Reasons (Timeline: 20 minutes)

Outdated Software: Old versions of web servers, applications, or operating systems often contain known security holes.

SSL/TLS Certificate Issues: Expired, misconfigured, or weak certificates fail security checks.

Open Ports: Unnecessary network ports left open create potential entry points for attackers.

Weak Encryption: Older encryption methods are no longer considered secure.

Missing Security Headers: Web servers should include specific security instructions for browsers.

Step 4: Plan Your Fixes (Timeline: 1-2 hours)

Create a prioritized list of fixes based on:

Severity level
Your technical comfort level
Available resources
Potential business impact

Step 5: Implement Solutions (Timeline: Varies widely)

For Software Updates:

Schedule updates during low-traffic periods
Test updates in a staging environment first
Keep backups before making changes

For SSL/TLS Issues:

Renew expired certificates
Update to stronger encryption standards
Configure proper certificate chains

For Open Ports:

Close unnecessary ports
Ensure only required services are running
Configure firewall rules properly

Step 6: Request a Rescan (Timeline: 1-3 business days)

After implementing fixes, request a new scan from your ASV. Most vendors offer free rescans within a certain timeframe.

Step 7: Verify Success and Document Changes

Keep records of what was changed and when. This documentation helps with future scans and compliance audits.

Common Questions Beginners Have

“How Long Will It Take to Fix These Issues?”

The timeline varies greatly depending on the specific vulnerabilities and your technical resources. Simple fixes like software updates might take a few hours, while more complex issues could require days or weeks. Most businesses can resolve common scan failures within 1-2 weeks.

“Can I Still Process Credit Cards While My Scan Is Failed?”

Technically, yes, but you’re operating outside of compliance requirements. Some merchant account providers may impose fines or additional fees. It’s best to address failures quickly to avoid complications.

“Why Did My Scan Pass Last Quarter But Fail Now?”

Security standards evolve constantly. New vulnerabilities are discovered, and scanning criteria become more stringent over time. What was acceptable three months ago might not meet current standards.

“Are These Vulnerabilities Actually Dangerous?”

While not every vulnerability represents an immediate threat, they all create potential security risks. Cybercriminals often exploit combinations of seemingly minor vulnerabilities to gain system access.

“How Much Will It Cost to Fix These Issues?”

Costs vary widely. Simple software updates might be free, while major infrastructure changes could cost thousands of dollars. Many common fixes can be handled with existing resources or minimal expense.

“What If I Don’t Understand the Technical Terms?”

Don’t let technical jargon intimidate you. Your ASV should provide explanations in plain English. When in doubt, ask questions – it’s better to seek clarification than to implement incorrect fixes.

Mistakes to Avoid

Ignoring the Problem

The Mistake: Hoping the problem will go away or that no one will notice.

Why It’s Harmful: Vulnerabilities don’t fix themselves, and compliance requirements don’t disappear.

How to Avoid: Address scan failures promptly and systematically.

Making Changes Without Understanding Them

The Mistake: Blindly following technical recommendations without understanding their impact.

Why It’s Harmful: You might break legitimate business functionality or create new problems.

How to Avoid: Test changes in a safe environment first, and always keep backups.

Focusing Only on Passing the Scan

The Mistake: Making minimal changes just to pass without considering overall security.

Why It’s Harmful: You might miss important security improvements that protect your business.

How to Avoid: View scan failures as opportunities to strengthen your overall security posture.

Not Documenting Changes

The Mistake: Making fixes without keeping records of what was changed.

Why It’s Harmful: You’ll struggle to troubleshoot future issues or explain changes to auditors.

How to Avoid: Maintain a log of all security-related changes and their rationale.

Waiting Until the Last Minute

The Mistake: Addressing scan failures just before compliance deadlines.

Why It’s Harmful: You won’t have time to properly test fixes or address complications.

How to Avoid: Run scans early in your quarterly cycle and address issues promptly.

Getting Help: DIY vs. Professional Assistance

When You Can Handle It Yourself

Simple Software Updates: If you’re comfortable updating applications and operating systems.

Certificate Renewals: When you have experience managing SSL certificates.

Basic Configuration Changes: For straightforward firewall or server setting adjustments.

When to Seek Professional Help

Complex Infrastructure Changes: When fixes require significant system modifications.

Critical Business Systems: If mistakes could disrupt essential business operations.

Time Constraints: When you need issues resolved quickly but lack internal resources.

Recurring Failures: If you’ve attempted fixes but continue to fail scans.

Types of Professional Services Available

Managed Security Services: Ongoing security management and monitoring.

Compliance Consultants: Specialists who focus specifically on PCI compliance.

IT Security Firms: Companies that can address both immediate fixes and long-term security strategy.

Vulnerability Management Services: Services that help identify, prioritize, and fix security issues.

How to Evaluate Service Providers

Relevant Experience: Look for providers with specific PCI compliance experience.

Clear Communication: Choose providers who can explain technical issues in business terms.

Transparent Pricing: Avoid providers who can’t give clear estimates for common fixes.

References: Ask for references from similar businesses.

Response Time: Ensure they can meet your compliance deadlines.

Next Steps: Your Action Plan

Immediate Actions (This Week)

1. Obtain your detailed scan report if you haven’t already
2. Identify critical and high-priority vulnerabilities
3. Assess your internal capabilities for addressing issues
4. Create a timeline for fixes based on your compliance deadline

Short-term Actions (Next 2-4 Weeks)

1. Implement fixes for critical vulnerabilities first
2. Address high-priority issues
3. Test all changes thoroughly
4. Request a rescan once major issues are resolved

Long-term Actions (Ongoing)

1. Establish a regular schedule for security updates
2. Monitor for new vulnerabilities between quarterly scans
3. Consider implementing additional security measures beyond minimum requirements
4. Develop relationships with trusted security professionals for future needs

Resources for Deeper Learning

PCI Security Standards Council official documentation
Your ASV’s knowledge base and support resources
Industry-specific compliance guides
Cybersecurity training programs for your team

Frequently Asked Questions

1. How often do I need to run PCI scans?

Most businesses must complete quarterly ASV scans, but the specific frequency depends on your merchant level and the type of compliance validation you’re required to complete. Check with your merchant account provider or payment processor to confirm your requirements.

2. What’s the difference between internal and external scans?

External scans (ASV scans) examine your internet-facing systems from outside your network, simulating how an external attacker might probe for vulnerabilities. Internal scans examine systems from within your network and are typically required for higher-level compliance validations.

3. Can I use any scanning company, or does it have to be an ASV?

For PCI compliance purposes, you must use an Approved Scanning Vendor (ASV) certified by the PCI Security Standards Council. However, you can also use other security scanning tools for additional security monitoring.

4. What happens if I can’t fix all the vulnerabilities before my compliance deadline?

Contact your merchant account provider immediately to discuss your situation. Some issues might qualify for risk acceptance or compensating controls, but this requires proper documentation and approval. Don’t assume you can simply ignore unfixable vulnerabilities.

5. Do I need to scan all my systems or just the ones that process credit cards?

You need to scan all internet-facing systems that could potentially impact the security of cardholder data. This often includes systems that don’t directly process payments but are on the same network segment or could provide access to payment systems.

6. How much should I expect to pay for PCI scanning services?

ASV scanning services typically cost between $100-$500 per quarter, depending on the number of IP addresses being scanned and the level of support provided. Be wary of extremely cheap services that might not provide adequate support when you need help understanding or fixing issues.

Conclusion

A failed PCI scan might feel overwhelming at first, but it’s actually an opportunity to strengthen your business’s security posture and protect your customers’ sensitive information. By understanding why scans fail and following a systematic approach to addressing vulnerabilities, you can turn this challenge into a competitive advantage.

Remember that PCI compliance is not just about checking boxes – it’s about creating a secure environment for your business operations and customer transactions. Each vulnerability you fix makes your business more resilient against cyber threats and demonstrates your commitment to data security.

The key to success is taking action promptly, asking questions when you need clarification, and viewing compliance as an ongoing process rather than a one-time event. Whether you handle fixes internally or work with security professionals, the important thing is to address issues systematically and learn from the process.

Ready to take control of your PCI compliance journey? Try our free PCI SAQ Wizard tool at PCICompliance.com to determine which Self-Assessment Questionnaire (SAQ) your business needs and get started on the path to full compliance. Our tool takes the guesswork out of compliance requirements and provides you with a clear roadmap tailored to your specific business situation.

PCICompliance.com helps thousands of businesses achieve and maintain PCI DSS compliance with affordable tools, expert guidance, and ongoing support. Let us help you turn your compliance challenges into confidence and security for your business.