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Fencer Intel
medium 4.4

CVE-2020-29457 json

Improper Certificate Validation in OPCFoundation.NetStandard.Opc.Ua.Core

published 5y ago modified 4mo ago also GHSA-mjww-934m-h4jw , EUVD-2021-2369

cvss
4.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

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

Patch / fix

  • nuget OPCFoundation.NetStandard.Opc.Ua.Core 1.4.365.10
  • opcfoundation ua-.netstandard 1.4.365.10

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Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:P/A:N
GitHub 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
nuget OPCFoundation.NetStandard.Opc.Ua.Core
<1.4.365.10
1.4.365.10

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.