Security readout for executives and security teams
Siemens SICLOCK TC100 and TC400 time devices are reported vulnerable in all versions. A network attacker who can reach UDP port 69 could modify device firmware. That creates a serious integrity risk for operational environments, but the provided sources do not include CVSS scoring, confirmed exploitation, or detailed vendor remediation text. Exposure is likely limited to environments running Siemens SICLOCK TC100 or TC400 where UDP/69 is reachable from untrusted or broadly routed networks. Internet exposure would be especially concerning, but the sources do not state observed exposure levels. Treat this as high priority if these devices support operational timing or industrial processes. The issue allows firmware modification with network access, but urgency depends on whether UDP/69 is reachable and whether Siemens guidance has already been applied. Mitigation focus: Identify SICLOCK TC100 and TC400 devices in asset inventories.; Check Siemens ProductCERT advisory SSA-197012 for vendor remediation guidance.; Restrict UDP/69 access to trusted management networks only..
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-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2018-4853 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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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.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.