CVE-2025-9495

HIGH

Viessmann Vitogate 300 < 3.0.0.0 - Unauthenticated Authentication Bypass via Client-Side UI Manipulation

Title source: llm

Description

The Vitogate 300 web interface fails to enforce proper server-side authentication and relies on frontend-based authentication controls. This allows an attacker to simply modify HTML elements in the browser’s developer tools to bypass login restrictions. By removing specific UI elements, an attacker can reveal the hidden administration menu, giving them full control over the device.

References (1)

Core 1

Core References

Various Sources

https://https://www.corporate.carrier.com/product-security/advisories-resources/

Scores

CVSS v4 8.7

EPSS 0.0030

EPSS Percentile 21.0%

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-602

Status published

Products (1)

Viessmann/Vitogate 300 1 - 3.0.0.0

Published Sep 23, 2025

Tracked Since Feb 18, 2026