CVE-2025-9495
High
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.
SeverityHigh
CVSS8.7
Exploit probability—
ProductVitogate 300
PublishedSep 23, 2025
First seenSep 23, 2025
Weakness typeCWE-602CWE-602
How to fix
Update
- Viessmann Vitogate 3003.0.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Viessmann Vitogate 300 | 1 ≤ v < 3.0.0.0 | 3.0.0.0 |
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