VPN Vulnerabilities Don’t Have to Become Breaches

Unpatched and exposed VPNs remain one of the most common entry points for ransomware and major outages. Modern access architectures eliminate this risk by removing exposed VPN infrastructure altogether.

 

The Most Exposed Entry Point in Your Environment

An attacker scans the internet. They are not targeting your organization specifically. They are scanning for exposed VPN gateways. They find one. It is running a known vulnerability. A patch exists. It has not been applied.

Within minutes, the attacker exploits it. No phishing email. No stolen password. No user interaction.

They are inside.

This is how many modern ransomware attacks begin. VPNs, designed to provide secure remote access, have become one of the most common entry points for attackers. When vulnerabilities are exposed to the internet, they create a direct path into the organization. And unlike credential-based attacks, these breaches do not depend on user behavior. They depend on architecture.

How VPN Vulnerabilities Are Exploited

VPN appliances are often exposed directly to the internet so remote users can connect from anywhere. This makes them a high-value target for attackers. When a vulnerability is discovered, attackers move quickly. Exploit code is often publicly available within days. Automated tools scan the internet looking for unpatched systems.

Once a vulnerable VPN is identified, attackers can:

• Bypass authentication
• Extract sensitive data, including credentials
• Establish persistent access inside the network

In many cases, this initial access is only the beginning. Once attackers are inside, they can move deeper into the environment and prepare for larger attacks such as ransomware deployment. These attacks do not rely on tricking users. They rely on exposed infrastructure.

When a VPN Becomes the Front Door for Attackers

A widely reported breach involving a global financial services company highlights how quickly VPN vulnerabilities can escalate into a business-wide crisis.

Attackers exploited a known vulnerability in the organization's VPN infrastructure. The vulnerability had already been disclosed publicly, and patches were available. Because the system remained unpatched and exposed to the internet, attackers were able to exploit it to gain access.

Once inside, they established persistent access and remained undetected for an extended period of time. They then deployed ransomware across the organization. The impact was immediate and severe.

Global websites were taken offline. Core financial services were disrupted. Retail operations were forced into manual processes. Systems remained unavailable for weeks.

The reported ransom demand was approximately $3 million.

Beyond the immediate financial impact, the organization experienced long-term reputational damage and loss of customer trust.

The attackers did not rely on phishing or stolen credentials. They walked through an exposed and vulnerable front door.

Why Traditional VPN Architectures Create Risk

Traditional VPNs were designed for a different era. They assume that users connecting through the VPN can be trusted. Once authenticated, users are often granted broad access to internal networks.

This creates several challenges. First, VPNs are typically exposed to the internet, making them a constant target for attackers scanning for vulnerabilities. Second, security depends heavily on patching. If a vulnerability is discovered and not immediately addressed, the VPN becomes an open entry point. Third, once connected, users often have access to large portions of the network. This implicit trust model allows attackers to move laterally and expand their access after initial entry.

In other words, VPNs do not just provide access. They expose it.

Modern Access Security Removes the Front Door

Modern access architectures take a different approach. Instead of exposing infrastructure to the internet, they connect users only to the specific applications they are authorized to access. This significantly reduces the attack surface.

This model, often referred to as Zero Trust access, is built on the principle that no user or device should be automatically trusted. Access decisions are based on multiple factors, including identity, device trust, and context.

This approach helps address several of the risks associated with VPNs:

• Applications are not directly exposed to the internet
• Access is limited to specific resources, not entire networks
• Verification occurs before access is granted

By removing the concept of a publicly exposed "front door," organizations can significantly reduce the likelihood of vulnerability-based attacks.

The most effective way to secure a VPN is not to harden it. It is to remove it.

Security That Aligns with How Businesses Operate Today

Many organizations recognize the risks associated with legacy VPNs but hesitate to replace them due to complexity. Modern cloud-delivered platforms are designed to simplify this transition.

SonicWall Cloud Secure Edge (CSE) provides secure remote access using a Zero Trust model, without exposing VPN infrastructure to the internet. CSE connects users directly to authorized applications rather than the network itself. It verifies identity, device trust, and contextual signals before granting access.

Because it is delivered from the cloud, there are no VPN appliances to patch, maintain, or expose.

The result is a more secure and more scalable approach to remote access.

The Cost of Waiting

Many organizations continue to rely on VPNs because they are already in place. However, the cost of maintaining legacy access models is often underestimated.

Breaches involving VPN vulnerabilities regularly lead to:

• Extended operational downtime
• Disrupted customer services
• Ransom payments in the millions
• Regulatory and legal exposure
• Long-term reputational damage

The financial impact of a single incident can far exceed the cost of modernizing access security.

The choice is not whether to invest in security. It is whether to invest before or after a breach.

Learn More

VPN vulnerabilities continue to be one of the most common entry points for ransomware and major business disruption.

Learn more about Cloud Secure Edge (CSE), a ZTNA solution purpose-built for SMBs.