---
id: CVE-2024-42513
title: >-
  Vulnerability in the OPC UA .NET Standard Stack before 1.5.374.158 allows an
  unauthorized attacker to bypass application authentication when using HTTPS
  endpoints.
summary: >-
  Vulnerability in the OPC UA .NET Standard Stack before 1.5.374.158 allows an
  unauthorized attacker to bypass application authentication when using HTTPS
  endpoints.
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-305
vendor: opcfoundation
product: ua_.net_standard_stack
affected:
  - ua_.net_standard_stack < 1.5.374.158
patched:
  - ua_.net_standard_stack 1.5.374.158
published: '2025-02-10'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:18:47.157'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-42513'
references:
  - url: >-
      https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2024-42513.pdf
    label: cve@mitre.org
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-858251.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00577
epssPercentile: 0.46222
ingestedAt: '2026-10-15T03:30:12.783Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2025-02-10T20:38:31.202098Z'
---

## Overview

Vulnerability in the OPC UA .NET Standard Stack before 1.5.374.158 allows an unauthorized attacker to bypass application authentication when using HTTPS endpoints.

## Affected

- `ua_.net_standard_stack < 1.5.374.158`

## Remediation

Upgrade past the affected range:

- `ua_.net_standard_stack 1.5.374.158`