CVE intelligence and bounded remediation

CVE-2018-4852 — A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions)

Critical CVSS 9.8

A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with network access to the device could potentially circumvent the authentication mechanism if he/she is able to obtain certain knowledge specific to the attacked device.

Severity
Critical
CVSS
9.8 (3.0)
Published
2018-07-03
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-288, CWE-287

Affected products

  • siemens / siclock_tc400_firmware
  • siemens / siclock_tc100_firmware

Matched remediation archetype

Authentication bypass and missing authentication

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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