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6.5

SICLOCK TC100 and TC400 expose passwords in clear text

CVE-2018-4855 · published 8 years ago
Summary

Both the TC100 and TC400 devices keep passwords in plain text inside their configuration files and transmit them over the network without encryption. This can allow anyone who can view the files or watch the network traffic to learn the passwords and gain unauthorized access. Apply any available firmware updates, change the passwords, and consider using encrypted network connections or isolating the devices from sensitive networks.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
siemens siclock_tc400_firmware All versions
cpe:2.3:o:siemens:siclock_tc400_firmware:-:*:*:*:*:*:*:*
siemens siclock_tc100_firmware All versions
cpe:2.3:o:siemens:siclock_tc100_firmware:-:*:*:*:*:*:*:*
Original advisory text
A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). Unencrypted storage of passwords in the client configuration files and during network transmiss...
A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). Unencrypted storage of passwords in the client configuration files and during network transmission could allow an attacker in a privileged position to obtain access passwords.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
6.5 Medium
Exploitation
1% chance of attack within 30 days
Type
CWE-311Missing Encryption of Sensitive Data
Timeline
Published3 Jul 2018
Updated31 Oct 2026
First seen29 Sep 2026
Sources
CVE-2018-4855 · NVD
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