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CVE-2026-89207

Quick assessment

Affected
Siemens WTV676-HB6035 Web Interface
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 r

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-89207

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1287
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Siemens WTV676-HB6035 Web Interface 0 ~ V3.94 -
Siemens WTV776-HB6035 Web Interface 0 ~ V4.17 -

II. Public POCs for CVE-2026-89207

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III. Intelligence Information for CVE-2026-89207

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Vendor Advisories for CVE-2026-89207 (1)

IV. Related Vulnerabilities

Same vendor: Siemens
Same weakness: CWE-1287

V. Comments for CVE-2026-89207

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