CVE-2020-29457
Improper Certificate Validation in OPCFoundation.NetStandard.Opc.Ua.Core
A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 could allow a rogue application to establish a secure connection.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 could allow a rogue application to establish a secure connection.
- Record
CVE-2020-29457- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
CVE List No score
A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 could allow a rogue application to establish a secure connection.
- Record
CVE-2020-29457- Updated
- 2026-11-02
EUVDEUVD-2021-2369 No score
A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 could allow a rogue application to establish a secure connection.
- Record
EUVD-2021-2369- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-mjww-934m-h4jw
Improper Certificate Validation in OPCFoundation.NetStandard.Opc.Ua.Core
A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 allows attackers to establish a connection using invalid certificates.
- Record
GHSA-mjww-934m-h4jw- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
OSV
A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 could allow a rogue application to establish a secure connection.
- Record
CVE-2020-29457- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-mjww-934m-h4jw
Improper Certificate Validation in OPCFoundation.NetStandard.Opc.Ua.Core
A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 allows attackers to establish a connection using invalid certificates.
- Record
GHSA-mjww-934m-h4jw- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
OPCFoundation.NetStandard.Opc.Ua.CoreNuGet |
through 1.4.365.2 | 1.4.365.10 |
OPCFoundation.NetStandard.Opc.Ua.CoreNuGet |
before 1.4.365.10, plus listed versions 0.0.30.0.60.0.70.0.80.0.9 Show 20 moreShow less0.1.00.1.10.1.20.1.30.1.50.1.60.1.70.1.80.1.90.2.00.2.10.2.20.2.30.2.41.4.363.104-preview1.4.363.1071.4.364.401.4.365-gfc341ee8c51.4.365.1-preview1.4.365.2 |
1.4.365.10 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-29457 is a medium vulnerability (CVSS 4.4) in Opcfoundation Ua-.netstandard, published February 16, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.31%, the 24th percentile. Fixed in OPCFoundation.NetStandard.Opc.Ua.Core 1.4.365.10.
References
github.com/OPCFoundation/UA-.NETStandard
nuget.org/packages/OPCFoundation.NetStandard.Opc.Ua
opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2020-29457.pdf
nvd.nist.gov/vuln/detail/CVE-2020-29457