CVE-2019-19135

mediumpriority · track · 30OT risk · elevatedEPSS 0.010 · 64 %ileDEEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.04% (64th) EPSS
CVSS 5.8 · medium
Is it mine?
7 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

In OPC Foundation OPC UA .NET Standard codebase 1.4.357.28, servers do not create sufficiently random numbers in OPCFoundation.NetStandard.Opc.Ua before 1.4.359.31, which allows man in the middle attackers to reuse encrypted user credentials sent over the network.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedSIDIS Primesiemens_psirt

    Update to V4.0.400 or later version

  • FixedSIDIS Primecisa_csaf_ot

    Update to V4.0.400 or later version

  • MitigationSIDIS Primesiemens_psirt

    CVE-2019-19135: Enable encrypted communication between the affected product (OPC UA client) and the OPC UA server(s)

  • MitigationSIDIS Primecisa_csaf_ot

    CVE-2019-19135: Enable encrypted communication between the affected product (OPC UA client) and the OPC UA server(s)

02

cvss

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

7.4
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.8–7.4

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 4.9
v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 5.2
v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · CISA US
v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · OSV
v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · Siemens ProductCERT DE
v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-330USprimaryCWE-330USCWE-330USCWE-330USCWE-522US
04

affected products (7)

Products and version ranges known to be affected.

05

advisories (3)

Vendor and ecosystem advisories describing this.

  • SSA-108696SSA-108696: Multiple Vulnerabilities in SIDIS Prime before V4.0.4002024-02-13csaf · siemens_psirtDE

    SIDIS Prime before V4.0.400 is affected by multiple vulnerabilities in the components OPC UA and OpenSSL, that could allow an unauthenticated attacker with access to the network where SIDIS Prime is installed to reuse OPC UA client credentials, create a denial of service condition of the SIDIS Prime OPC UA client, or create a denial of service condition of the SIDIS Prime TLS service. Siemens has released a new version of SIDIS Prime and recommends to update to the latest version.

  • GHSA-pq4w-qm9g-qx68Insufficient Nonce Validation in Eclipse Milo Client2020-03-16ghsa · osvUS

    ### Impact Credential replay affecting those connected to a server when *all 3* of the following conditions are met: - `SecurityPolicy` is `None` - using username/password or X509-based authentication - the server has a defect causing it to send null/empty or zeroed nonces ### Patches The problem has been patched in version `0.3.6`. A more relaxed treatment of validation as agreed upon by the OPC UA Security Working Group is implemented in version `0.3.7`. ### Workarounds Do not use username/password or X509-based authentication with `SecurityPolicy` of `None`. ### References https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdf ### For more information If you have any questions or comments about this advisory: * Open an issue at [https://github.com/eclipse/milo/issues](https://github.com/eclipse/milo/issues) * Email [the mailing list](mailto:milo-dev@eclipse.org)

  • ICSA-24-046-02Siemens SIDIS Prime2024-02-13icsa · cisa_csaf_otUS

    SIDIS Prime before V4.0.400 is affected by multiple vulnerabilities in the components OPC UA and OpenSSL, that could allow an unauthenticated attacker with access to the network where SIDIS Prime is installed to reuse OPC UA client credentials, create a denial of service condition of the SIDIS Prime OPC UA client, or create a denial of service condition of the SIDIS Prime TLS service. Siemens has released a new version of SIDIS Prime and recommends to update to the latest version.

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcisa_csaf_otnvdosvsiemens_psirtNVDCVE.orgMITRE
published 2020-03-16modified 2026-06-17
09

references (7)

External citations — patches, advisories, analysis.

scry

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