MySQL Exposure on the Internet: A Global Snapshot from Shodan Data

Methodology

Query used:

MySQL exposure on port 3306 responding.

This dataset is based entirely on Shodan indexed results at the time of collection.

Important note: Not every service on port 3306 is guaranteed to be MySQL. Some systems may run alternative database engines, proxies, or custom services on that port. However, the overwhelming majority of responses fingerprint as MySQL or MySQL compatible variants.

Total Global MySQL Exposure

Total exposed MySQL services: 2,053,167

That makes MySQL one of the most widely exposed infrastructure services visible on the public internet.

Germany is the highest in the EU, followed by the Netherlands and France. Exposure correlates strongly with infrastructure size and hosting density. But scale does not eliminate risk.

MySQL Exposure Across the EU-27

Focusing specifically on the 27 European Union member states, we identified:

Total exposed MySQL services: 233,262

That is nearly a quarter of a million publicly reachable database servers across the EU alone.

Germany alone represents more than one third of all EU MySQL exposure. The Netherlands and France follow, which is consistent with their strong hosting and cloud infrastructure presence.

Raw numbers alone do not indicate weaker security. Larger digital economies naturally host more services. What matters more is version distribution and configuration quality.

Version Distribution in the EU

Looking at version fingerprints across the EU dataset, we see a mix of modern and legacy builds.

Encouragingly, MySQL 8.0 variants dominate the top of the list. However, there is still a substantial presence of legacy versions.

Version Distribution Overview (Global)

One of the most important signals in exposed database services is version diversity. The dataset includes a wide range of versions, including a long tail of legacy versions still running.

MySQL 5.5 and 5.6 are end of life. MySQL 5.1 and 5.0 are ancient. MySQL 4.x appearing on the internet in 2026 is a major red flag. When a database is both publicly exposed and running unsupported software, risk multiplies.

Is Public MySQL Exposure a Security Problem?

In most architectures, yes. A database server should not be directly reachable from the public internet.

Databases are meant to sit behind:

• Application servers
• API gateways
• Reverse proxies
• Private networks
• VPN tunnels

When MySQL is exposed directly on port 3306, it presents:

• Direct authentication surface
• Brute force opportunity
• User enumeration potential
• Version fingerprinting
• Exploit targeting

Even if authentication is required, exposure alone increases attack surface. From a pentester perspective, internet exposed MySQL immediately becomes an assessment focus.

From a Pentester Perspective

If we can reach a MySQL service directly from the internet, we evaluate:

• Does it allow remote root login?
• Are weak passwords accepted?
• Is there no connection throttling?
• Is there no account lockout?
• Is TLS disabled?
• Is it running an end of life version?

If brute force is possible without throttling or lockout, this is typically classified as High severity. If weak credentials are found or anonymous access exists, it becomes Critical.

Exposure combined with outdated versions does not decrease risk. It compounds it. Databases often contain user data, credentials, API keys, and financial records. Compromise impact can be extreme.

Important Context and Limitations

This analysis is based entirely on Shodan visibility. Shodan does not represent a complete census of all exposed MySQL services. Some hosts may block scanners, be behind rate limiting, or use non standard configurations.

Additionally, not every service on port 3306 is guaranteed to be MySQL, and some instances may be honeypots. However, the data clearly shows that exposure dramatically increases attack surface.

Final Thoughts

Over 2 million exposed MySQL services worldwide is not a small number. Unlike FTP or RDP, MySQL often holds the core data of an organization. When databases are directly reachable from the internet, especially on outdated versions, risk escalates quickly.

Exposure alone does not equal compromise. But exposure combined with weak authentication, poor segmentation, or end of life software creates one of the highest impact attack surfaces in modern infrastructure.