Siemens · Siemens Eta4 · CVE-2016-7987
**Name of the Vulnerable Software and Affected Versions**
Siemens ETA4 firmware versions prior to Revision 08
**Description**
The issue allows specially crafted packets sent to Port 2404/TCP to cause the affected device to go into defect mode, resulting in a Denial-of-Service. A cold start might be required to recover the system.
**Recommendations**
For versions prior to Revision 08, update the firmware to Revision 08 or later to resolve the issue. As a temporary workaround, consider restricting access to Port 2404/TCP to minimize the risk of exploitation.