Cyber Security in Government Sector: Risks, Best Practices & Frameworks

Check out what risks and threats government agencies and bodies are facing in the world of cybersecurity. We also cover the best practices for securing government systems. Read on to learn more.

Government agencies at all levels operate services that support national security, public welfare, and economic stability. That makes them constant targets for cybercriminals.

Ransomware attacks are a particular area of concern. In just the first half of 2025, government agencies saw a 65% surge in these attacks.

In addition to financial losses, ransomware attacks disrupt public services and increase the risk of exposure of sensitive citizen data.

With attack frequency rising, federal government agencies, along with state and local governments, must implement robust cybersecurity measures and best practices.

This article looks at the main cybersecurity challenges the government sector faces and practical ways agencies can push back against them.

What Is Cybersecurity in Government?

Government cybersecurity encompasses the tools, policies, and operational processes used to secure IT systems, data, and infrastructure at the federal, state, and local levels.

These environments include a diverse set of targets or attack surfaces, such as voting systems, public health systems, transportation infrastructure, emergency services, and many more.

Because these systems support mission-critical operations, even a brief outage can interrupt essential public services and functions. Therefore, securing them is non-negotiable.

Compliance frameworks exist to provide structure and oversight of cybersecurity.

For instance, FISMA, FedRAMP, and NIST are all designed to help agencies protect information, implement security programs, and perform assessments.

Many government agencies rely on hybrid environments (a combination of cloud-based and on-premises infrastructure).

However, the use of outdated technology and constrained IT teams means agencies are often ill-equipped to maintain security across all environments.

Cybersecurity Risks and Challenges in the Government Sector

Government organizations consistently rank among the highest-value targets worldwide.

As an example, in the first quarter of 2025, they experienced the highest average ransom demands, reaching $6.7 million. During this period, over 17 million records were breached during ransomware attacks.

Attackers chase government systems because they hold huge amounts of personally identifiable information and other confidential data.

Critical infrastructure under government control also draws attention because a single successful strike can cause widespread chaos.

To add to the appeal, the government sector often relies on legacy systems and outdated technology. This, combined with tight budgets and a lack of skilled staff, means agencies are less agile and unable to combat an attack when it occurs.

Regarding the risks themselves, they extend far beyond ransomware attacks. Other challenges include:

• Phishing and social engineering: Email and impersonation tactics designed to exploit user behavior to gain access, bypass controls, or steal credentials.
• Insider threats: Malicious intent or accidental misuse of privileged access contribute to data exposure or system disruption.
• Supply chain vulnerabilities: Third-party products and services offer indirect pathways into government environments.
• Nation-state and APT attacks: Adversaries pursue long-term espionage, intelligence collection, and disruption.
• DDoS attacks on public services: Distributed denial-of-service attacks target public portals and communication channels, slowing or disabling access.
• Data breaches & PII exposure: Unauthorized access can compromise sensitive government datasets.

Best Practices for Securing Government Systems

Strengthening cybersecurity across government environments requires a structured, multi-layered approach that accounts for legacy systems and other public sector constraints.

Secure access, up-to-date systems, continuous monitoring, and well-practiced response procedures should all work together to provide a unified solution.

Core principles, such as automation, handle threats faster than manual processes, while visibility into networks, data endpoints, and identities flags risks in real-time.

Additionally, adopting a sero-trust approach means every user and device is verified rather than assuming they are safe.

These practices directly reduce risk and improve resilience by limiting opportunities for cybercriminals and ensuring that agencies can successfully (and quickly) recover operations if an attack slips through the net.

Here’s what that looks like in practice:

• Enforce strong access controls: Implement least-privilege access, identity verification, and multi-factor authentication to limit the risk of compromised systems and accounts.
• Isolate or patch legacy systems: If modernization is not feasible, isolate outdated assets or apply virtual patching to segment networks and reduce the risk of exploitation.
• Security assessments and audits: Since the risk landscape continuously evolves, regular evaluations help validate the effectiveness of current controls and highlight any vulnerabilities.
• Staff training: Implement structured training programs to teach staff on the importance of cyber hygiene and incident reporting. Training should also encompass phishing awareness and how to identify it.
• Continuous monitoring: Agency teams must implement real-time monitoring and automated response across data endpoints, cloud workloads, and identity systems.
• Incident response plans: Teams should know what to do when an incident is flagged. Implement robust plans and test them thoroughly before they are deployed.
• Integrate security platforms: Use unified tools that consolidate data and provide extended detection and response. Features like automated detection and accelerated response increase efficiency and reduce operational load.

Key Cybersecurity Frameworks & Mandates for Government

Cybersecurity frameworks apply across all industries, and they are vital for structuring and standardizing public sector cybersecurity programs.

Some frameworks are mandatory for government agencies, while others are recommended as best practices within all levels of government.

Each guides risk management in some way, enabling agencies to remain compliant and audit-ready.

The two mandatory frameworks consist of:

• The Federal Information Security Modernization Act (FISMA): A federal mandate that requires government agencies to implement comprehensive information security programs and undergo regular assessments and reporting.
• The Federal Risk and Authorization Management Program (FedRAMP): Standardizes security assessment and authorization for cloud products used by federal agencies. It provides baselines at low, moderate, and high-impact levels.

Recommended frameworks include:

• The National Institute of Standards and Technology (NIST) Cyber Security Framework (CSF): A widely adopted model organized around five core functions: Identify, Protect, Detect, Respond, and Recover. It supports structured risk management and continuous cybersecurity improvement.
• NIST SP 800-53: A detailed catalog of operational, technical, and management controls that support FISMA compliance and help guide secure system design.
• State-level or hybrid compliance: States often adopt combinations of NIST and local mandates to align with regional security requirements and resource constraints.

How SentinelOne Supports Government Cybersecurity

SentinelOne provides advanced security solutions engineered to meet public sector requirements and compliance frameworks.

The platform delivers automated detection, real-time visibility, and zero-trust-aligned controls that government agencies need.

With SentinelOne, agencies can close critical security gaps, counter sector-specific threats, and implement the best practices outlined above. All while meeting the strict requirements of frameworks such as NIST, FISMA, and FedRAMP.

Core capabilities include:

• Autonomous XDR for unified threat prevention, detection, and response across endpoints, cloud networks, and identities.
• FedRAMP-High authorized enables secure adoption of cloud services at all FedRAMP impact levels.
• Identity threat detection and protection block credential misuse and lateral movement.
• Rapid ransomware containment and rollback restore affected systems without relying on external backups.
• Support for audit-readiness through compliance mapping for NIST, FISMA, and FedRAMP.
• 24/7 MDR and threat hunting with Vigilance for Gov for continuous monitoring and expert-led investigation.

FAQs

Why is cybersecurity important for government agencies?

Cybersecurity is essential for government agencies because the public sector is one of the most at-risk areas for cyberattacks. The large volumes of sensitive data and critical infrastructure make agencies an attractive target for criminals.

Therefore, strong cybersecurity is necessary to prevent data breaches, service disruption, and protect national and local infrastructure.

What are the top cyber threats to public sector organizations?

The most common cyber threats to public sector organizations include:

• Ransomware
• Phishing
• Social engineering
• Insider threats
• Supply chain vulnerabilities
• Nation-state attacks
• DDoS attacks on public services
• Data breaches on personal information

How do FISMA and FedRAMP affect government IT security?

FISMA and FedRAMP affect government IT security by mandating that agencies implement structured frameworks.

FISMA requires the implementation of risk-based information security programs and requires organizations to undergo regular security assessments. FedRAMP standardizes security authorization processes for cloud services, ensuring providers meet defined security baselines.

What challenges do local governments face in cybersecurity?

Local governments face several cybersecurity challenges, including the use of legacy and outdated IT systems. Lack of skilled staff is another issue, as well as limited budgets for implementing or upgrading robust infrastructure.

How can agencies strengthen cybersecurity on limited budgets?

Agencies can strengthen cybersecurity on limited budgets by prioritizing high-impact controls such as multi-factor authentication, network segmentation, automated monitoring, and staff training.

Consolidating security tools into unified platforms also reduces operational overhead and maximizes existing resources.

What are the 5 C's of cybersecurity?

The five C’s of cybersecurity commonly refer to Change, Compliance, Cost, Continuity, and Coverage. 

These are the main areas that organizations must evaluate to create and maintain an effective security posture.

What is the government cybersecurity framework?

The term “government security framework” typically refers to the use of a structured, government-approved model, such as NIST Cybersecurity Framework (CSF), FISMA requirements, and NIST SP 800-53.

These frameworks are designed to encourage best practices around risk management, security control, and ongoing monitoring.

Which framework is commonly used for cybersecurity governance?

The NIST Cybersecurity Framework (CSF) is the most widely used governance framework.

It’s commonly adopted across federal agencies, state and local governments, and commercial organizations due to its flexible, risk-based structure.