CVE-2024-42512
Security Update for the OPC UA .NET Standard Stack
Vulnerability in the OPC UA .NET Standard Stack before 1.5.374.158 allows an unauthorized attacker to bypass application authentication when the deprecated Basic128Rsa15 security policy is enabled.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Vulnerability in the OPC UA .NET Standard Stack before 1.5.374.158 allows an unauthorized attacker to bypass application authentication when the deprecated Basic128Rsa15 security policy is enabled.
- Record
CVE-2024-42512- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L - Weakness
- CWE-208
- Updated
- 2026-11-02
EUVDEUVD-2025-5035
Vulnerability in the OPC UA .NET Standard Stack before 1.5.374.158 allows an unauthorized attacker to bypass application authentication when the deprecated Basic128Rsa15 security policy is enabled.
- Record
EUVD-2025-5035- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-h958-fxgg-g7w3
Security Update for the OPC UA .NET Standard Stack
This security update resolves a vulnerability in the OPC UA .NET Standard Stack that allows an unauthorized attacker to bypass application authentication when the deprecated Basic128Rsa15 security policy is enabled.
Note that the Basic128Rsa15 is disabled by default so most users will not be affected. When this patch is applied the Server closes all channels using the Basic128Rsa15 if an attack is detected. This introduces a DoS before any compromise can occur which is preferable to a compromise. To prevent this failure, applications must stop using Basic128Rsa15.
- Record
GHSA-h958-fxgg-g7w3- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-208, CWE-639
- Updated
- 2026-11-02
GitHub AdvisoriesGHSA-qv5f-57gw-vx3h
Duplicate Advisory: Authorization Bypass in OPC UA .NET Standard Stack
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-h958-fxgg-g7w3. This link is maintained to preserve external references.
Original Description
Vulnerability in the OPC UA .NET Standard Stack before 1.5.374.158 allows an unauthorized attacker to bypass application authentication when the deprecated Basic128Rsa15 security policy is enabled.
- Record
GHSA-qv5f-57gw-vx3h- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L - Weakness
- CWE-208, CWE-639
- Updated
- 2026-11-02
NVD
Vulnerability in the OPC UA .NET Standard Stack before 1.5.374.158 allows an unauthorized attacker to bypass application authentication when the deprecated Basic128Rsa15 security policy is enabled.
- Record
CVE-2024-42512- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L - Weakness
- CWE-208
- Updated
- 2026-11-02
OSV
Vulnerability in the OPC UA .NET Standard Stack before 1.5.374.158 allows an unauthorized attacker to bypass application authentication when the deprecated Basic128Rsa15 security policy is enabled.
- Record
CVE-2024-42512- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L - Updated
- 2026-11-02
OSVGHSA-h958-fxgg-g7w3
Security Update for the OPC UA .NET Standard Stack
This security update resolves a vulnerability in the OPC UA .NET Standard Stack that allows an unauthorized attacker to bypass application authentication when the deprecated Basic128Rsa15 security policy is enabled.
Note that the Basic128Rsa15 is disabled by default so most users will not be affected. When this patch is applied the Server closes all channels using the Basic128Rsa15 if an attack is detected. This introduces a DoS before any compromise can occur which is preferable to a compromise. To prevent this failure, applications must stop using Basic128Rsa15.
- Record
GHSA-h958-fxgg-g7w3- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-208, CWE-639
- Updated
- 2026-11-02
OSVGHSA-qv5f-57gw-vx3h
Duplicate Advisory: Authorization Bypass in OPC UA .NET Standard Stack
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-h958-fxgg-g7w3. This link is maintained to preserve external references.
Original Description
Vulnerability in the OPC UA .NET Standard Stack before 1.5.374.158 allows an unauthorized attacker to bypass application authentication when the deprecated Basic128Rsa15 security policy is enabled.
- Record
GHSA-qv5f-57gw-vx3h- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L - Weakness
- CWE-208, CWE-639
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
OPCFoundation.NetStandard.Opc.Ua.CoreNuGet |
before 1.5.374.158 | 1.5.374.158 |
OPCFoundation.NetStandard.Opc.Ua.CoreNuGet |
before 1.5.374.158, plus listed versions 0.0.30.0.60.0.70.0.80.0.9 Show 45 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-preview1.4.365.101.4.365.21.4.365.231.4.365.481.4.366.31-preview1.4.366.381.4.367.1001.4.367.391.4.367.411.4.367.421.4.367.64-preview1.4.367.751.4.367.951.4.368.27-preview1.4.368.331.4.368.52-preview1.4.368.531.4.368.581.4.369.301.4.370.11.4.370.121.4.370.91.4.371.411.4.371.501.4.371.601.4.371.86 |
1.5.374.158 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-42512 is a high vulnerability (CVSS 8.6) in Opcfoundation Ua .net Standard Stack, published February 10, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.59%, the 48th percentile. Fixed in OPCFoundation.NetStandard.Opc.Ua.Core 1.5.374.158.
References
files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2024-42512.pdf
cert-portal.siemens.com/productcert/html/ssa-858251.html
github.com/OPCFoundation/UA-.NETStandard/security/advisories/GHSA-h958-fxgg-g7w3
nvd.nist.gov/vuln/detail/CVE-2024-42512
Left out here: 33 versions. The JSON record has them.