---
id: CVE-2026-89207
title: >-
  A vulnerability has been identified in WTV676-HB6035 Web Interface (All
  versions < V3.94), WTV776-HB6035 Web Interface (All versions < V4.17)
summary: "A vulnerability has been identified in WTV676-HB6035 Web Interface (All versions < V3.94), WTV776-HB6035 Web Interface (All versions < V4.17). Affected devices do not properly validate input received from backend services.\r\nThis could al…"
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-1287
vendor: Siemens
product: WTV676-HB6035 Web Interface
affected:
  - wtv676-hb6035_web_interface < V3.94
  - wtv776-hb6035_web_interface < V4.17
published: '2026-09-16'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:25:59.470'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89207'
references:
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-823812.html'
    label: productcert@siemens.com
tags:
  - nvd
  - cve.org
epss: 0.00336
epssPercentile: 0.27158
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-16T18:13:09.211468Z'
ingestedAt: '2026-09-16T08:52:29.589Z'
---

## Overview

A vulnerability has been identified in WTV676-HB6035 Web Interface (All versions < V3.94), WTV776-HB6035 Web Interface (All versions < V4.17). Affected devices do not properly validate input received from backend services.
This could allow an unauthenticated remote attacker to force the device into protection mode, which results in losing remote connectivity functions (Web Access).

## Remediation

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