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HIGH severity

High severity vulnerability that affects OPCFoundation.NetStandard.Opc.UaGHSA-782p-53wq-cxmj

HIGH

GHSA-782p-53wq-cxmj is a high-severity (CVSS 7.5) Out-of-bounds Write vulnerability in OPCFoundation.NetStandard.Opc.Ua. EPSS puts its 30-day exploitation probability at 11.8% (96th percentile). A fix is available for OPCFoundation.NetStandard.Opc.Ua — see the affected versions and patch details below.

Also known asCVE-2018-12086
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
11.8%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs96th percentile — riskier than 96% of all scored CVEsHighest risk
7.35%14.9%22.4%30.0%25.7%11.8%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

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

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetOPCFoundation.NetStandard.Opc.Uaall versions1.4.353.15dotnet add package OPCFoundation.NetStandard.Opc.Ua --version 1.4.353.15

Affected Products

5 products · 5 configurations
OS
debian linuxdebian
1 version
9.0
Application
unified architecture .net-standardopcfoundation
≤ 1.03.352.12
range
Application
unified architecture ansicopcfoundation
≤ 1.03.340
range
Application
unified architecture-.net-legacyopcfoundation
≤ 1.03.342
range
Application
unified architecture-javaopcfoundation
≤ 1.03.343
range

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, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update OPCFoundation.NetStandard.Opc.Ua to 1.4.353.15 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-782p-53wq-cxmj is resolved across your whole dependency graph.

  3. Workarounds

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Frequently Asked Questions

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.
O3 Security · Impact-Aware SCA

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High severity vulnerability that affects OPCFoundation.Net…