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.NET
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Not in CISA KEV
MEDIUM severity

CVE-2022-33916 — OPCFoundation.NetStandard…

MEDIUMFix: OPCFoundation/UA-.NETStandard@313aa2a

CVE-2022-33916 is a medium-severity (CVSS 5.3) vulnerability in OPCFoundation.NetStandard.Opc.Ua.Server. A fix is available for OPCFoundation.NetStandard.Opc.Ua.Server — see the affected versions and patch details below.

Exposure of Sensitive Information in OPCFoundation.NetStandard.Opc.Ua.Server

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs73th percentile — riskier than 73% of all scored CVEsHighest risk
0.00%0.63%1.26%1.89%0.3%1.4%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
.NETOPCFoundation.NetStandard.Opc.Ua.Server

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

OPC UA .NET Standard Reference Server 1.04.368 allows a remote attacker to cause the application to access sensitive information.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetOPCFoundation.NetStandard.Opc.Ua.Serverall versions1.4.370.9dotnet add package OPCFoundation.NetStandard.Opc.Ua.Server --version 1.4.370.9

Affected Products

1 product · 1 configurations
Application
ua .net standard stackopcfoundation
1 version
1.04.368

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for OPCFoundation.NetStandard.Opc.Ua.Server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update OPCFoundation.NetStandard.Opc.Ua.Server to 1.4.370.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-33916 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

OPC UA .NET Standard Reference Server 1.04.368 allows a remote attacker to cause the application to access sensitive information.
O3 Security · Impact-Aware SCA

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CVE-2022-33916: OPCFoundation — Fixed in 1.4.370.9