Client-Side Enforcement of Server-Side Security in Vitogate 300 - CVE-2025-9495
Published: September 24, 2025
Vulnerability identifier: #VU116072
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2025-9495
CWE-ID: CWE-602
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Viessmann
Affected software:
Vitogate 300
Vitogate 300
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to insufficient client-side validation. A remote user on the local network can modify the client-side behavior to bypass the protection mechanisms, leading to unexpected interactions between the client and server.
How to mitigate CVE-2025-9495
Install updates from vendor's website.