CVE-2018-4853: Siemens Siclock TC100 Firmware

Critical severity, CVSS 9.8. EPSS: 2.3% chance of exploitation in the next 30 days.

A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with network access to port 69/udp could modify the firmware of the device.

Affected products

• Siemens Siclock TC100 Firmware: affected versions not specified
• Siemens Siclock TC400 Firmware: affected versions not specified

Published 2018-07-03. Last modified 2026-06-17.