What is Endpoint Security? Types, Threats & Best Practices

Every device that connects to your network is a potential entry point for attackers. Laptops, smartphones, servers, IoT sensors, point-of-sale terminals: if it connects, it can be targeted. As organizations rely on more devices, spread across more locations, the question of how to protect all of them has become one of the most pressing challenges in IT.

That’s the problem endpoint security solves. And for MSPs and IT teams managing dozens, hundreds or thousands of devices, getting endpoint protection right has never mattered more. Tools like Datto EDR, Datto AV and Kaseya MDR are built specifically to make it manageable at scale, without needing an enterprise-sized security team to run it.

This guide covers what endpoint security is, how it works, what threats it addresses and how to build an approach that holds up against today’s attacks.

What is endpoint security?

Endpoint security is the practice of protecting devices that connect to a network from cyberattacks, unauthorized access and data loss. It covers the policies, tools and processes organizations use to monitor, detect threats on and respond to incidents across every connected device in their environment.

The term is broad by design. Endpoint security isn’t a single product. It describes a category of protection that includes antivirus, endpoint detection and response (EDR), managed detection and response (MDR), patch management and device control, among other capabilities. Together, these tools create layered endpoint protection across the attack surface that connected devices represent.

For organizations running lean IT teams or managing multiple clients, endpoint security is often the most operationally demanding part of the security stack. Every new device added to the network is another thing that needs to be protected, monitored and kept current.

What counts as an endpoint?

Any device that connects to a network and exchanges data qualifies as an endpoint. The list is longer than most people assume:

• Desktops and workstations
• Laptops (company-issued and personal)
• Smartphones and tablets
• Servers (physical and virtual)
• IoT devices (sensors, cameras, smart building systems)
• Point-of-sale terminals
• Printers and multifunction devices
• Medical devices
• Industrial control systems and OT equipment
• ATMs and kiosks

Remote work and BYOD policies have significantly expanded this list. Employees now connect from home networks, coffee shops and shared workspaces using personal devices that may not meet corporate security standards. Each one is an endpoint and each one needs protecting.

Why is endpoint security important?

Endpoints are the most common attack vector for cybercriminals — and for good reason. There are more of them than any other target, they’re often outside the corporate network perimeter and they’re operated by humans who can be manipulated.

According to the 2025 Unit 42 Global Incident Response Report, 70% of incidents involved attackers exploiting three or more attack surfaces simultaneously, with endpoints consistently among the primary targets. A single compromised laptop can give an attacker a foothold in the network. From there, they can move laterally, escalate privileges, exfiltrate data or deploy ransomware across the environment.

The cost of getting this wrong is severe. IBM’s 2024 Cost of a Data Breach Report puts the average global breach cost at $4.88 million — a 10% increase from the prior year and the largest single-year jump since the pandemic. For SMBs, where a single incident can affect operations for weeks, the consequences are often proportionally worse. According to the Kaseya 2026 State of the MSP Report, 71% of MSPs reported year-over-year revenue growth in cybersecurity services, reflecting just how firmly security has become a central client need.

Remote work has raised the stakes further. Employees connecting from outside the office bypass the network-level controls that traditional perimeter security relies on. Endpoint protection fills this gap, extending coverage to devices regardless of where they’re connecting from.

How does endpoint security work?

Most endpoint security solutions follow a common operational model, even when the underlying technology varies. Here’s how the process typically unfolds, from deployment through to resolution, in five steps:

1. Agent deployment and data collection: A lightweight software agent is installed on each endpoint. This agent runs continuously, collecting telemetry on process execution, file activity, network connections, registry changes and user behavior. That data is sent to a central management console, either cloud-based or on-premises, where it can be analyzed. The agent is designed to be unobtrusive, recording what it needs without degrading device performance.
2. Detection: The management console compares incoming telemetry against threat databases and behavioral baselines. Signature-based detection catches known malware by matching file patterns against a library of identified threats, while behavioral detection looks for anomalies: processes running at unusual times, unexpected encryption activity, files moving to unusual locations. Modern endpoint security solutions combine both methods, because signature detection handles known threats quickly while behavioral analysis catches novel attacks, fileless malware and zero-day exploits that don’t match any known signature.
3. Alerting and response: When a threat is detected, the system generates an alert. Depending on the configuration and the severity of the threat, the response can be automated or analyst-driven. Automated response actions typically include isolating the affected endpoint from the network, terminating malicious processes and quarantining suspicious files. Analyst-driven response involves human review of the alert, investigation of the incident and guided remediation. Speed matters here: the 2026 Unit 42 Global Incident Response Report found that the fastest attacks now reach data exfiltration within 72 minutes of initial access.
4. Forensics and investigation: After an incident, endpoint security tools provide forensic data: a record of what happened, when, on which device and how far the threat progressed. Security teams use this to trace an attack’s path through the environment, identify the entry point and understand what was accessed or exfiltrated.
5. Remediation and reporting: Once the scope of the incident is understood, the affected systems are cleaned, patched or restored. Detailed reporting documents how the incident was handled, which is often required for compliance audits, and informs updates to detection rules so the same attack doesn’t succeed twice.

Types of endpoint security

Endpoint security is a category that encompasses several distinct tools, each solving a specific part of the protection problem. Understanding the differences matters because no single tool covers everything.

Antivirus and next-generation antivirus (NGAV)

Traditional antivirus detects and removes known malware using signature databases. It scans files and processes, compares them against a library of identified threats and blocks matches. It works well for established, cataloged malware but falls short against novel variants, modified files and threats that don’t write to disk at all.

NGAV extends this with machine learning and behavioral analysis. Instead of relying solely on known signatures, it looks at what code does, which means it can catch threats that have never been seen before. For most organizations, antivirus is a necessary baseline layer, but it’s not sufficient on its own. Datto AV, part of the Kaseya 365 Endpoint platform, delivers business antivirus with built-in DNS filtering and tamper protection, covering both Windows and macOS environments from a single management console.

Endpoint detection and response (EDR)

EDR is a more advanced layer that provides continuous monitoring, behavioral analysis and the ability to investigate and respond to threats in real time. Where antivirus asks “is this file malicious?” EDR asks “is this behavior consistent with an attack?” EDR tools record detailed endpoint activity, enabling security teams to trace an attack’s path through the environment and contain it before it spreads. EDR also supports threat hunting, allowing analysts to proactively search for signs of compromise rather than waiting for automated alerts.

Extended detection and response (XDR)

XDR extends EDR visibility across multiple security layers, including network, cloud and identity, giving security teams a unified view of threats that span more than one part of the environment. Where EDR focuses on the endpoint, XDR correlates signals across the entire stack. This matters because the 2026 Unit 42 report found that 87% of attacks now unfold across two or more attack surfaces simultaneously.

Managed detection and response (MDR)

MDR delivers EDR and XDR capabilities as a managed service. Rather than running detection and response internally, organizations rely on a team of security analysts who monitor the environment around the clock, investigate alerts and respond to confirmed threats on their behalf. For organizations without an in-house SOC, MDR is the practical path to operational endpoint protection. It turns detection technology into an active defense, with human experts making the call on what’s real and what needs to be contained.

Endpoint protection platforms (EPP)

EPP is the umbrella category that combines prevention-focused tools (antivirus, NGAV, web filtering, application control) into a unified platform. EPPs focus on stopping threats before they can execute. Most modern endpoint security stacks combine an EPP for prevention with EDR for detection and response, since prevention alone can’t guarantee a zero-breach rate.

Mobile device management (MDM) and unified endpoint management (UEM)

MDM and UEM extend endpoint management to mobile devices and non-traditional endpoints, allowing IT teams to enforce security policies, push updates and remotely wipe devices across a mixed-device environment. As the proportion of mobile and personally owned devices connecting to corporate resources grows, MDM and UEM have become a core part of enterprise endpoint protection.

Data loss prevention (DLP)

DLP monitors and controls the movement of sensitive data, preventing it from being transferred to unauthorized locations, copied to removable media or sent outside the organization. DLP is particularly important in regulated industries like healthcare and finance, where accidental data exposure carries compliance risk alongside the reputational damage. Without it, endpoint protection stops attacks from outside but leaves a gap for data leaving the organization through legitimate-looking actions.

Network access control (NAC)

NAC verifies the security posture of devices before allowing them to connect to the network. If a device doesn’t meet policy requirements, such as missing required patches or lacking an active endpoint security agent, NAC blocks it from connecting. This is especially important in environments with high BYOD usage, where IT teams can’t fully control what’s installed on personal devices before they reach the network.

Endpoint security vs. antivirus: What’s the difference?

This is one of the most common points of confusion, and it’s worth addressing directly.

Antivirus is a specific tool that detects and removes known malware using signature-based matching. It works well against established threats that have been cataloged and identified. It doesn’t work well against new or modified threats, fileless attacks, behavioral exploits or advanced persistent threats.

Endpoint security is a category of protection that includes antivirus but goes significantly further. A complete endpoint security approach adds behavioral detection, real-time monitoring, automated response, forensic investigation, patch management and policy enforcement.

The practical difference: antivirus tells you a known threat landed on a device. Endpoint security tells you what it did, where it went, what else it touched and how to stop it from happening again.

Traditional antivirus also operates per device, with limited visibility outside that device. Endpoint security solutions use centralized management consoles that give IT teams visibility and control across every endpoint in the environment simultaneously. For organizations that have outgrown antivirus but aren’t sure where to start, pairing Datto AV with Datto EDR gives both the prevention layer and the detection and response layer in a single integrated platform.

Common endpoint security threats

Understanding what endpoint protection defends against helps clarify why a layered approach is necessary. These are the threats organizations encounter most often.

Ransomware

Ransomware encrypts files on the affected endpoint and spreads laterally across the network. Modern ransomware variants move fast. A single compromised endpoint can encrypt hundreds of machines within hours. Endpoint security tools detect the behavioral signatures of encryption activity and can halt the process and isolate the device before the attack spreads. Rollback capabilities let teams restore encrypted files to their pre-attack state without relying solely on backup.

Malware and fileless malware

Malware covers a broad category of malicious software, from trojans and keyloggers to spyware and rootkits. Fileless malware is a particularly difficult variant to detect. Rather than writing a malicious file to disk, it executes entirely in memory using legitimate system tools. This means signature-based detection misses it entirely. Behavioral analysis catches fileless malware by looking at what a process does, rather than what it is.

Phishing and social engineering

Phishing attacks target employees directly, using deceptive emails or websites to steal credentials or deliver malware. They remain among the most common initial access vectors. According to the 2025 Unit 42 report, phishing was responsible for 23% of all initial access in the incidents investigated, fueled in part by AI-generated lures that are more convincing than ever. Endpoint security controls, including email gateways, web filtering and DNS filtering, interrupt these attacks at multiple points before a device is compromised.

Zero-day exploits

Zero-day vulnerabilities are software flaws that haven’t been publicly disclosed or patched. Attackers exploit them before vendors can release a fix. Behavioral detection in advanced endpoint security tools can catch the effects of a zero-day exploit even when the vulnerability itself is unknown, by flagging the abnormal process behavior that follows rather than waiting for a signature match.

Insider threats

Insider threats, whether from malicious employees or accidental data exposure, originate behind the perimeter. Endpoint security monitors file access, data movement and user behavior, flagging activity that falls outside normal patterns. This is one area where antivirus alone offers no protection at all, since the actions often look legitimate at the file level.

BYOD and shadow IT

Personal devices connecting to corporate resources introduce vulnerabilities that IT teams haven’t assessed. Shadow IT, the unauthorized applications and services employees use to get work done, expands the attack surface in ways that are hard to track without endpoint visibility. NAC and conditional access policies can limit which devices connect, while endpoint monitoring covers the ones that do.

Endpoint security challenges for MSPs and IT teams

Even with the right tools in place, endpoint security is operationally demanding. These are the challenges most teams run into, and the approaches that address them:

• Alert fatigue is one of the biggest day-to-day problems. Modern endpoint security tools generate a high volume of alerts, and many are false positives. Without effective triage, security teams spend most of their time sorting through noise and miss genuine threats in the process. The Kaseya 2026 State of the MSP Report found that 50% of MSPs now cite the complexity of cybersecurity products as a top barrier to expanding security services, up significantly from 38% the prior year. Solutions that focus detection on critical behaviors and filter out low-confidence alerts address this directly.
• Device sprawl compounds the challenge. Organizations are managing more endpoint types across more locations than ever. Keeping every device inventoried, protected and current on patches requires automation. Manual approaches don’t scale, and gaps in coverage are often exactly where attackers find their way in.
• The skills gap is the constraint that hits hardest. Effective incident investigation requires security expertise that most IT teams and MSPs don’t have on staff around the clock. The same Kaseya report found that 39% of MSPs cite difficulty hiring skilled cybersecurity professionals as a barrier, up from 29% the prior year. This is where MDR services have the most impact. Rather than expecting every IT generalist to act as a threat analyst, MDR provides the expert layer that converts detections into operational responses.
• BYOD and unmanaged devices remain one of the harder problems to solve cleanly. Personal devices connecting to corporate resources are difficult to enforce policy on and may not support agent deployment. Network access control and conditional access policies help contain the risk, but some exposure is unavoidable without strict device enrollment requirements.
• Keeping up with patches is also a consistent pressure point. Unpatched vulnerabilities are among the most common initial access vectors. Keeping every endpoint current across a diverse mix of operating systems and software requires automated patch management integrated with RMM, not manual review by technicians already stretched thin.

Best practices for endpoint security

Strong endpoint protection doesn’t come from any single tool. It comes from how the tools are deployed, integrated and operated over time. These practices make the most meaningful difference:

Inventory every endpoint
You can’t protect what you don’t know exists. Start with a complete, current inventory of every device that connects to the network, including remote devices and BYOD. Endpoint management tools integrated with your RMM give you this visibility automatically.

Layer defenses
Antivirus alone isn’t enough. NGAV, EDR and behavioral detection address different parts of the threat landscape. Using them in combination means that what one layer misses, another can catch. An attacker who gets past signature-based detection should still trip behavioral analysis.

Automate patching
Manual patching processes create gaps. Automated patch management, integrated with your RMM platform, ensures every endpoint gets updates without relying on individual users to apply them. This is one of the highest-value steps any organization can take to reduce attack surface.

Apply the principle of least privilege
Users should only have access to what they need for their job. Limiting privileges reduces the damage an attacker can do with a compromised account. Combined with MFA, this significantly narrows the blast radius of a successful credential theft.

Don’t leave EDR detections unattended
EDR is only effective if someone reviews and acts on the alerts it generates. Without analyst coverage, detections accumulate without producing responses. For teams that can’t monitor around the clock, MDR provides the human layer that makes EDR operational rather than ornamental.

Segment your network
Network segmentation limits lateral movement. If an attacker compromises one endpoint, segmentation contains the spread and prevents them from reaching the rest of the environment. This is especially important given how quickly modern attacks move.

Test your response process
Know what happens when an endpoint is compromised. Who gets notified? What steps get taken? Running tabletop exercises and planning incident response before an incident happens prevents the confusion that turns a contained breach into a major one.

How Kaseya approaches endpoint security

Kaseya builds its endpoint security capabilities specifically for MSPs and lean IT teams, which means the tools are designed to be deployed and managed at scale without requiring a dedicated security operations center.

Datto AV provides business antivirus with built-in DNS filtering and tamper protection, covering Windows and macOS from a single console. It blocks malicious domains before a connection is made, adding a proactive layer of endpoint protection, and integrates directly into the Kaseya 365 Endpoint platform for streamlined management.

Datto EDR is Kaseya’s endpoint detection and response solution. It uses behavioral analysis to detect threats that bypass traditional antivirus, focuses alerts on the top 20 critical behaviors to reduce noise and includes 65+ automated response actions. Alerts are mapped to the MITRE ATT&CK framework for clear context, and the platform includes ransomware rollback to restore encrypted files without relying on backup alone. Datto EDR integrates directly with Datto RMM and Kaseya VSA, enabling one-click deployment and unified alert management from a single dashboard.

Kaseya MDR (formerly RocketCyber) adds the managed detection and response layer on top of EDR. US-based security analysts monitor your environment around the clock, investigate alerts, validate threats and take containment action before escalating to your team. For MSPs who want to expand their security offering without adding headcount, and for internal IT teams who can’t realistically staff a 24/7 SOC, MDR converts endpoint security technology into an operational security service.

All three are part of Kaseya 365 Endpoint, which bundles antivirus, EDR, ransomware detection, RMM and endpoint backup in a single subscription. Kaseya 365 Endpoint Pro adds MDR coverage for organizations that need always-on analyst support.