---
id: CVE-2026-85115
title: >-
  A vulnerability has been identified in .NET Client Library for SIMATIC S7
  Webserver API (All versions < V3.3.62)
summary: "A vulnerability has been identified in .NET Client Library for SIMATIC S7 Webserver API (All versions < V3.3.62). Affected applications do not properly redact PLC restore passwords from HTTP error exception messages.\r\n\r\nThis could allow …"
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-209
vendor: Siemens
product: .NET Client Library for SIMATIC S7 Webserver API
affected:
  - .net_client_library_for_simatic_s7_webserver_api < V3.3.62
published: '2026-10-13'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T16:03:48.883'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85115'
references:
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-390352.html'
    label: productcert@siemens.com
tags:
  - nvd
  - cve.org
epss: 0.00109
epssPercentile: 0.01227
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-14T13:46:11.469945Z'
ingestedAt: '2026-10-13T10:22:03.570Z'
---

## Overview

A vulnerability has been identified in .NET Client Library for SIMATIC S7 Webserver API (All versions < V3.3.62). Affected applications do not properly redact PLC restore passwords from HTTP error exception messages.

This could allow an attacker with access to logs or other diagnostic output to obtain the plaintext restore password and potentially perform unauthorized operations on the PLC.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.