CVE-2018-4851
A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions).
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with network access to the device could cause a Denial-of-Service condition by sending certain packets to the device, causing potential reboots of the device. The core functionality of the device could be impacted. The time serving functionality recovers when time synchronization with GPS devices or other NTP servers are completed.
- CVSS 3.0
- 8.2 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- EPSS
- 1.46% probability · 73th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-399, CWE-20
- Affected
- siemens/siclock tc400 firmware · siemens/siclock tc100 firmware
- Source
- productcert@siemens.com
EPSS 1.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/104672Third Party Advisory, VDB Entry
- https://cert-portal.siemens.com/productcert/pdf/ssa-197012.pdfMitigation, Vendor Advisory
- http://www.securityfocus.com/bid/104672Third Party Advisory, VDB Entry
- https://cert-portal.siemens.com/productcert/pdf/ssa-197012.pdfMitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.