A guide to cloud security for financial services

Key takeaways

• Encrypting data, limiting access, monitoring for threats, and reviewing vendors are core parts of financial services cloud security.
• Under the shared responsibility model, your institution remains responsible for how its data, access, and settings are secured.
• PCI DSS, SOC 2, GDPR, and data residency rules shape how financial institutions protect data, where some data can be stored, and how quickly certain incidents must be reported.
• Choosing a cloud environment that’s compliance-ready reduces the amount of manual work needed during audits.

Financial services breaches in 2026 cost an average of $6.3 million, according to IBM. As banks, credit unions, and lenders use the cloud to deliver digital services faster, sensitive client data is stored and processed across more systems and providers. Each additional system or provider creates another place where gaps in access, security settings, or responsibilities can lead to a breach and another area you may need to account for during an audit.

Cloud security for financial services involves knowing where your data is stored, who can access it, what each provider is responsible for, and whether the cloud environment supports your regulatory and audit requirements.

What is cloud security for financial services?

Cloud security for financial services protects banking, investment, and customer data across hybrid and multi-cloud environments. It uses encryption, access management, monitoring, and incident response to protect sensitive data while meeting regulatory requirements when storing and processing data in the cloud.

Core security pillars

The core security pillars for protecting financial data in the cloud requires several layers working together.

Data protection

Financial data should be encrypted while it’s stored and while it moves between systems or providers. Encryption at rest protects stored data, while encryption in transit protects data as it travels across networks.

The keys used to unlock encrypted data also need to be protected from unauthorized access. This is  especially important when data moves between cloud providers or between systems in your institution’s own facilities and the cloud.

Identity and access management

Identity and access management controls who can access cloud systems and what they can do once they’re signed in. Multi-factor authentication (MFA), role-based access controls, and least-privilege policies help limit access to only what each user needs.

Review access regularly, including for service accounts, automated tools, and other accounts used by applications or systems to connect to cloud resources.

Threat detection and response

Cloud environments need continuous monitoring for unusual activity and security gaps. AI and machine learning help flag behavior that differs from normal patterns, while monitoring tools identify security issues and changes to settings or access permissions. Catching those problems early gives teams time to investigate and respond before they are exploited.

Vendor and third-party risk management

Before moving regulated data to a cloud provider, review its security practices, certifications, incident response process, data-location options, and third-party access.

Under the shared responsibility model, the provider secures the parts of the cloud environment it operates, while your institution remains responsible for its data, user access, and security decisions.

Regulatory and compliance requirements

Regulatory and compliance requirements for financial institutions are the security, privacy, and industry rules that apply to how you store, process, and protect customer data. Which ones apply depends on where you operate and the data you handle.

PCI DSS, SOC 2, GDPR, and data sovereignty

Payment Card Industry Data Security Standard (PCI DSS), System and Organization Controls 2 (SOC 2), General Data Protection Regulation (GDPR), and data sovereignty set rules for how financial institutions store, process, and protect data in the cloud. They also affect where your primary data and backups can be stored or moved. The table below highlights what each one requires and how it affects your cloud environment.

Framework or requirement	What it covers	Who it applies to	Main cloud implication
PCI DSS	Payment card data	Organizations that store, process, or transmit cardholder data	Cloud systems handling payment data must meet applicable security requirements
SOC 2	Security, availability, confidentiality, and other controls	Service organizations that undergo a SOC 2 examination	Reports help institutions evaluate a provider’s controls
GDPR	Personal data protected under EU law	Organizations subject to EU data protection requirements	Rules affect how and where personal data is stored or transferred
Data sovereignty and residency	Where data is stored and which laws govern it	Depends on jurisdiction and data type	Cloud regions and backup locations affect where regulated data is allowed to reside

U.S. regulators to know

U.S. regulators are the federal and state agencies that set and enforce cybersecurity requirements for financial institutions.

The Gramm-Leach-Bliley Act (GLBA) Safeguards Rule requires covered financial institutions to maintain safeguards that protect customer information and address risks involving service providers.

Federal Financial Institutions Examination Council (FFIEC) guidance helps regulated financial institutions evaluate risks associated with cloud computing, including security, resilience, and third-party relationships.

New York-regulated financial companies need to comply with NYDFS Part 500 cybersecurity requirements, while public companies must follow SEC cybersecurity disclosure rules.

Continuous monitoring and automated reporting

Compliance requires ongoing monitoring, not just preparation for a scheduled audit. Continuous monitoring identifies policy violations, configuration changes, and gaps in security protections.

Automated reporting helps keep compliance documentation current. Policy-as-code turns security and compliance rules into automated checks that verify whether cloud settings follow defined requirements, while detailed logs create a record of activity and changes. This gives security and compliance teams more current, audit-ready evidence without having to rebuild that history when an audit begins.

Dedicated cloud options for financial services

Financial institutions have several dedicated cloud provider options. Some offer services designed for financial workloads, while others provide security platforms that work across the cloud services and providers an institution already uses.

IBM Cloud for Financial Services includes built-in controls designed around financial-services security and regulatory requirements. AWS for Financial Services offers cloud services and third-party tools for banking, capital markets, insurance, and payments, with security and compliance features across AWS. Orca Security helps financial institutions identify risks across AWS, Azure, and Google Cloud, including incorrect settings, access issues, and exposed sensitive data.

For financial-services workloads, Nexcess offers isolated cloud environments with PCI DSS and SOC 2-aligned controls, audit and compliance support, and predictable pricing. The setup is designed around your workload and gives your team clearer responsibilities and more control over how your regulated systems are run.

The best option depends on how much control you want and how much of the cloud environment you want your provider to manage.

The table below compares the main deployment models.

Deployment model	Compliance support	Control	Cost predictability	Operational overhead
Public hyperscaler	Broad compliance programs and tools, but customers are responsible for setting up many security controls	High flexibility, with many configuration choices	Can vary with usage and services	Requires more in-house cloud expertise
Industry cloud	Controls and services designed around industry requirements	More standardized around financial-services needs	Depends on provider and services used	Reduces some compliance setup
Private cloud	Dedicated environment separated from other customers	High	Often more predictable than usage-based public cloud models	Depends on how much the provider manages
Specialty cloud	Environment designed around specific workload, security, and compliance needs	High, with architecture tailored to the workload	Offers more predictable pricing	Managed options reduce infrastructure work for internal teams

Risks to plan for

Financial institutions face risks from attackers and the growing number of systems, vendors, and tools connected to its cloud environment. Identifying those weaknesses early gives your team more time to plan before it leads to a breach.

AI-driven attacks and shadow AI

AI is making attacks faster and easier to carry out. Attackers use AI to automate parts of an intrusion, create convincing phishing messages, or use deepfakes to impersonate executives and customers. IBM reported that AI-enabled malicious breaches increased 56% in 2026, with deepfake impersonation among the most common types of AI-enabled attacks.

Financial institutions also need to consider shadow AI, or employees using AI tools that have not been approved by the organization. Pasting sensitive customer, financial, or company information into public AI tools can expose that data. Verizon reported that frequent AI tool use among employees reached 45% in its 2026 DBIR.

Supply chain and third-party exposure

A financial institution can have strong security controls in place and still be exposed through a vendor or through software built with third-party components. These dependencies create supply chain risk because a compromised vendor or software component can give attackers a path into your systems or data.

This makes vendor reviews, software updates, access limits, and ongoing monitoring important even after a provider has been approved. Verizon reported that third-party involvement appeared in 34% of breaches in the financial and insurance sector in its 2026 DBIR.

Misconfiguration and visibility gaps

Using several cloud providers makes it harder to see how data, permissions, and security settings are set up across your entire environment. Older systems connected to newer cloud services add another layer of complexity when they use different security settings, access controls, and monitoring tools.

Centralized monitoring gives teams one view of risks across cloud systems and systems hosted within your facilities. This makes it easier to identify incorrect settings, unexpected changes, or users and accounts with more access than they need.

The cost of a breach

The cost of a breach goes beyond restoring affected systems. It can include investigation and response costs, regulatory expenses, and lost business.

IBM’s 2026 Cost of a Data Breach Report found that the average breach cost worldwide reached $4.99 million. AI-enabled malicious breaches cost an average of $6 million.

Why financial institutions move to the cloud

Financial institutions move to the cloud to add or adjust computing capacity without buying and maintaining as much physical hardware. This helps institutions handle changes in demand, support new digital services, and give development teams what they need to build and release applications faster.

Cloud environments also support faster recovery after an outage or disruption and offer a predictable cost model compared to maintaining and upgrading systems in your own facilities.

How to evaluate a cloud provider for regulated workloads

To evaluate a cloud provider for regulated workloads, look beyond performance and price. The provider needs to support the security, compliance, and operational requirements of the workloads it will host.

Questions to ask:

• What certifications, audit reports, or other independent security reviews can the provider share?
• Can you review the provider’s security and compliance practices when needed?
• Can you control where primary data, backups, and copies of that data are stored?
• What are the provider’s incident response and notification commitments?
• What happens to your data if you leave the provider, and how is it returned or deleted?
• Who is responsible for installing security updates, monitoring for threats, and responding to security issues?

How Nexcess supports financial services teams

Nexcess supports financial services teams by giving you control over how your cloud environment is set up while providing expert support for the technology behind it.

Depending on your requirements, Nexcess supports:

• Architecture: Nexcess can design isolated cloud environments around your workload, including dedicated and private cloud options, with a clear understanding of what your team manages and what Nexcess manages.
• Compliance: Nexcess offers PCI DSS-ready environments, audit-ready documentation, compliance support, and help with vendor reviews and audit preparation.
• Expert access: Nexcess engineers and solutions architects can help with architecture planning, migrations, managing your infrastructure, monitoring, and ongoing troubleshooting.

Talk with a Nexcess cloud expert about the security, compliance, and infrastructure requirements for your financial-services workloads.

A common challenge is that responsibilities blur as the environment changes. A team adds a provider, application, or integration, and then no one’s sure who’s patching, monitoring, or managing access for each part of the environment. The teams that avoid audit surprises document those responsibilities and revisit them whenever the architecture changes.

Kelly Goolsby, Director of Solution Architecture, Nexcess