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10 Synology DSM Security Gaps That Ransomware Exploits

Ransomware attacks continue to evolve, and modern attackers rarely rely on a single vulnerability. Instead, they look for a combination of weak passwords, outdated software, exposed management interfaces, poor backup practices, and excessive user permissions. A Synology NAS that stores file shares, Microsoft 365 backups, surveillance recordings, or business applications can become an attractive target if it is not properly secured.

The good news is that many successful attacks are not caused by unknown software vulnerabilities. They result from configuration issues that can often be identified and corrected before they are exploited. A comprehensive Synology security checkup helps organizations discover these hidden weaknesses, improve resilience, and strengthen their overall cybersecurity posture.

This guide highlights ten of the most common issues identified during Synology security assessments and explains how they can be addressed through a structured Synology audit package.

Why Configuration Matters More Than Hardware

Many organizations invest in enterprise NAS hardware but overlook ongoing security maintenance.

A secure deployment requires more than:

  • Enterprise drives

  • RAID protection

  • Fast networking

  • Large storage capacity

It also requires:

  • Proper access controls

  • Secure authentication

  • Regular updates

  • Continuous monitoring

  • Backup validation

  • Disaster recovery planning

A well-configured system is significantly more difficult for attackers to compromise.

1. Exposed DSM Management Ports

One of the most common findings during security assessments is direct internet exposure of the DSM management interface.

Common risks include:

  • Automated vulnerability scanning

  • Brute-force login attempts

  • Credential stuffing attacks

  • Unauthorized access attempts

Recommended Improvements

Organizations should consider:

  • Accessing DSM through VPN connections

  • Restricting administrative access

  • Enabling firewall rules

  • Disabling unnecessary public services

Reducing internet exposure significantly lowers the attack surface.

2. Default Administrator Accounts Still Enabled

Many deployments retain the default administrator account long after installation.

Attackers frequently target default account names because they are widely known.

Recommended Improvements

Best practices include:

  • Disable the default administrator account

  • Create named administrator accounts

  • Require strong passwords

  • Enable account lockout policies

These changes make automated attacks considerably more difficult.

3. Multi-Factor Authentication Not Enabled

Passwords alone no longer provide adequate protection. Strengthen administrator access by enabling two-factor authentication on Synology NAS.

Compromised credentials remain one of the leading causes of unauthorized access.

Recommended Improvements

Require:

  • Multi-factor authentication

  • Strong passphrases

  • Secure authentication policies

  • Login notifications

Additional authentication factors significantly reduce account compromise risk.

4. Outdated DSM or Packages

Software updates frequently include important security fixes. See how professional Synology support helps maintain secure, properly updated DSM environments.

Delaying updates may leave systems exposed to publicly known vulnerabilities.

Recommended Improvements

Organizations should:

  • Keep DSM current

  • Update installed packages

  • Remove unused applications

  • Review release notes before major upgrades

Updates should be tested appropriately before deployment into production environments.

5. Excessive Administrative Privileges

Many users receive more permissions than necessary.

Overprivileged accounts increase the impact of compromised credentials.

Recommended Improvements

Implement:

  • Role-based access control

  • Least-privilege administration

  • Separate administrator accounts

  • Periodic permission reviews

Administrative privileges should only be assigned where operationally necessary.

6. Firewall Rules Left at Default

Some organizations deploy DSM without reviewing firewall settings.

Leaving unnecessary services accessible increases exposure.

Recommended Improvements

Configure firewall policies that:

  • Restrict management traffic

  • Allow only required services

  • Limit administrative access

  • Block unnecessary protocols

Network segmentation can provide an additional layer of protection.

7. Backup Repositories Without Additional Protection

Backups are increasingly targeted by ransomware operators. If backup repositories are compromised alongside production systems, recovery options become much more limited.

Recommended Improvements

Organizations should consider:

Recovery planning should assume that attackers may attempt to target backup infrastructure.

8. Insufficient Storage Monitoring

Hardware failures often provide warning signs before complete failure occurs.

Ignoring alerts can lead to avoidable downtime.

Recommended Improvements

Enable monitoring for:

  • SMART health

  • Storage pool status

  • Capacity utilization

  • System alerts

  • Failed backup jobs

  • Temperature monitoring

Early detection helps prevent small issues from becoming major outages.

9. Weak Remote Access Configuration

Remote administration is essential for many organizations, but insecure remote access increases cyber risk.

Common issues include:

  • Direct internet exposure

  • Weak authentication

  • Shared administrator accounts

  • Unrestricted remote access

Recommended Improvements

Secure remote administration by:

  • Using VPN access

  • Enabling multi-factor authentication

  • Restricting IP access

  • Monitoring login activity

Every remote connection should be authenticated and logged.

10. Recovery Plans That Have Never Been Tested

Many organizations assume backups will work without ever testing restoration procedures.

Unfortunately, backup success does not always guarantee recovery success.

Recommended Improvements

Regularly test:

  • File restoration

  • Virtual machine recovery

  • Microsoft 365 recovery

  • Disaster recovery procedures

  • Recovery Time Objectives (RTO)

  • Recovery Point Objectives (RPO)

Routine testing provides confidence that recovery procedures will work when needed.

What a Synology Security Checkup Should Include

A professional Synology security checkup typically evaluates multiple aspects of the environment.

Areas commonly reviewed include:

  • DSM security configuration

  • User permissions

  • Network exposure

  • Firewall policies

  • Backup architecture

  • Storage health

  • Software versions

  • Authentication settings

  • Recovery readiness

  • System monitoring

Rather than focusing on a single issue, the assessment evaluates how the complete environment functions together.

Benefits of a Synology Audit Package

A structured Synology audit package can help organizations:

  • Identify hidden risks

  • Improve security posture

  • Optimize system performance

  • Validate backup readiness

  • Strengthen disaster recovery

  • Support compliance initiatives

  • Reduce operational risk

  • Improve long-term reliability

Many organizations schedule regular audits as part of their ongoing cybersecurity program rather than waiting for problems to occur. Broader cyber security planning helps address risks beyond NAS configuration.

Best Practices for Hardening Synology DSM Security

Organizations can strengthen their environments by:

  • Disabling unnecessary internet exposure

  • Enabling multi-factor authentication

  • Applying DSM updates promptly

  • Reviewing administrator permissions regularly

  • Monitoring storage health continuously

  • Protecting backup repositories

  • Testing recovery procedures

  • Performing routine security assessments

These practices help reduce ransomware risk while improving business continuity.

Why Organizations Choose Synology

Synology provides enterprise-grade security features through DSM, Secure SignIn, Btrfs, Snapshot Replication, Hyper Backup, ActiveProtect, Active Backup for Business, Active Backup for Microsoft 365, Synology High Availability, firewall controls, audit logging, and centralized management. When properly configured and maintained, these capabilities help organizations build secure storage environments that support long-term operational resilience. Identify hidden risks with a Synology Security Check-up.

About Epis Technology

Epis Technology helps organizations assess, secure, and optimize Synology environments through comprehensive security reviews, infrastructure assessments, Synology audit packages, backup architecture design, disaster recovery planning, cybersecurity consulting, performance optimization, and ongoing managed support. Using practical experience gained from enterprise deployments, Epis Technology helps businesses harden Synology DSM security, identify hidden configuration risks, and build resilient storage platforms that are better prepared to withstand modern cyber threats.

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