CVE-2020-29457

lowpriority · track · 18EPSS 0.003 · 24 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.31% (24th) EPSS

CVSS 2.1 · low

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 could allow a rogue application to establish a secure connection.

cvss

Technical severity, 0–10. One row per scoring source.

4.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.1–4.4

v2.02.1lowAV:L/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 2.9

v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 0.8 · impact 3.6

v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nsecondary · OSV

v3.14.1mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimaryCWE-295US

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
opcfoundation ua-.netstandard< 1.4.365.10nvdUScpe:2.3:a:opcfoundation:ua-.netstandard:*:*:*:*:*:*:*:*
NuGet OPCFoundation.NetStandard.Opc.Ua.Core< 1.4.365.10osvUSpkg:nuget/OPCFoundation.NetStandard.Opc.Ua.Core

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-mjww-934m-h4jwImproper Certificate Validation in OPCFoundation.NetStandard.Opc.Ua.Core2021-11-19ghsa · osvUS
A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 allows attackers to establish a connection using invalid certificates.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2021-02-16modified 2026-06-17

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+1889 more

references (10)

External citations — patches, advisories, analysis.

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