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NIST Advisory CVE-2025-14847 - MongoBleed Vulnerability

A vulnerability found in MongoDB may affect your OPC Router installations if remote access is exposed. Please read the following articles to take action on mitigating your risks. 

A new security vulnerability, referred to as MongoBleed, has been disclosed for MongoDB. Full details are available on the NIST National Vulnerability Database: CVE-2025-14847


This vulnerability applies when a MongoDB instance is reachable over the network. It does not affect every MongoDB installation, but it does increase risk where the database is exposed to network access.

OPC Router uses MongoDB internally for configuration and runtime data. The OPC Router development team has reviewed the issue and provided an initial assessment of the impact on OPC Router 4.x and OPC Router 5.x, as well as planned corrective measures.

This article summarizes the current understanding, risk levels, and recommended actions.

Impact on OPC Router 5.x

For typical OPC Router 5.x installations, the current assessment is that the risk from MongoBleed is minimal.

Key reasons:

  • By default, OPC Router 5.x does not use a MongoDB instance that is reachable from the network.
  • MongoBleed requires network-level access to the MongoDB instance to be exploitable.
  • The default configuration significantly limits exposure in standard deployments.

OPC Router 5.x on Docker

For Docker-based OPC Router 5.x deployments:

  • Do not expose the MongoDB port outside of the container.
  • Ensure MongoDB is only accessible internally within the container or Docker network.

If your current Docker configuration publishes the MongoDB port externally, review and harden that configuration to reduce exposure.

OPC Router 5.x on Windows

For standard Windows installations of OPC Router 5.x:

  • MongoDB is configured as localhost-only by default.
  • The database is only accessible from the local machine, not from other systems over the network, in a default configuration.

This default behavior further reduces the practical risk from MongoBleed in typical Windows deployments.

Impact on OPC Router 4.x

OPC Router 4.x uses a different remote management architecture that can increase exposure to MongoBleed in some scenarios.

In particular:

  • When Remote Management is enabled, the MongoDB instance used by OPC Router 4.x may be reachable over the network.
  • This legacy remote management design increases the potential attack surface compared to OPC Router 5.x.

Because of this:

  • OPC Router 4.x installations with Remote Management enabled are considered more exposed and should be reviewed.
  • Additional hardening or updates are recommended, especially in environments with higher security requirements.

Immediate Recommendations for High-Security Environments

For customers with critical or elevated security requirements (e.g., regulated environments, highly sensitive networks), the technology partner recommends an immediate mitigation step:

  • Upgrade MongoDB by replacing the MongoDB binary with a fixed version of the same major.minor release currently in use.

This is a targeted action you can take now, ahead of the upcoming maintenance releases, to align with best practices for mitigating MongoBleed.

In addition, we recommend that all users:

  • Ensure MongoDB is not exposed to untrusted networks.
  • For OPC Router 5.x Docker deployments, do not publish the MongoDB port externally.
  • For OPC Router 4.x, especially when Remote Management is enabled, review network exposure and apply the MongoDB binary update where appropriate.

More detailed, version-specific configuration guidance will be provided once the vendor’s full assessment is complete.

Planned Maintenance Releases

The OPC Router development team has announced plans to provide maintenance releases (MRs) to further harden affected versions against MongoBleed-related risks.

Planned releases include:

  • OPC Router 5.3 and higher
  • OPC Router 4.28

These maintenance releases are intended to:

  • Address scenarios where MongoDB may be reachable over the network.
  • Provide additional protections aligned with the MongoBleed vulnerability details.

We will update this article with specific version numbers, release dates, and recommended upgrade paths as that information becomes available.

Ongoing Analysis and Next Steps

The OPC Router team is actively working on:

  • Validating which installation scenarios are affected.
  • Preparing clear and practical action recommendations for different deployment models.
  • Coordinating a consistent external communication strategy.
  • Finalizing the planned maintenance releases for OPC Router 5.3+ and 4.28.

As their assessment progresses, additional technical details and step-by-step guidance will be published.

How We Will Communicate Updates

As more information becomes available, we will:

  • Update this article with new recommendations, configuration guidance, and download links for relevant maintenance releases.
  • Communicate proactively when final guidance and patches are available.

Getting Support

If you have questions about how MongoBleed affects your OPC Router deployment, or if you need assistance evaluating or hardening your environment, please contact Software Toolbox Technical Support with the following details where possible:

  • OPC Router version (4.x or 5.x, and specific build)
  • Operating system and deployment model (Windows, Docker, etc.)
  • Whether Remote Management is enabled (for OPC Router 4.x)
  • Any known network exposure of the MongoDB instance

We will continue to monitor this issue closely and will update this article as soon as more concrete instructions and maintenance releases are available.