Security readout for executives and security teams
Siemens SICLOCK TC100 and TC400 devices can be forced into a denial-of-service condition by network traffic. The reported impact is potential device reboot and disruption of core time-serving functions until synchronization with GPS or another NTP source completes. Exposure is limited to environments where SICLOCK TC100 or TC400 devices are reachable over a network by untrusted or compromised systems. Treat this as an operational availability risk, especially where accurate time supports industrial coordination, logging, or security monitoring. Prioritize exposed devices first. Mitigation focus: Identify any Siemens SICLOCK TC100 or TC400 devices in the environment.; Check Siemens ProductCERT advisory SSA-197012 for vendor-supported remediation guidance.; Restrict network access to SICLOCK devices to trusted time sources and administration networks..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-399: Exact CWE lookup
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Open ATT&CK lookupCVE-2018-4851 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://cert-portal.siemens.com/productcert/pdf/ssa-197012.pdfCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Resource Management Errors
Resource Management Errors represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.