How severe is CVE-2018-4855?

CVE-2018-4855 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-4855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-4855?

CVE-2018-4855 primarily affects Siemens Siclock Tc400 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-4855?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-4855 published?

CVE-2018-4855 was published on 2018-07-03 and last updated on 2026-06-17.

CVE-2018-4855

CVE-2018-4855 is a medium-severity vulnerability in Siemens Siclock Tc400 Firmware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-311.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-311
Affected product: Siemens Siclock Tc400 Firmware
Published: 2018-07-03
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2018-4855?: 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.
How severe is CVE-2018-4855?: CVE-2018-4855 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-4855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-4855?: CVE-2018-4855 primarily affects Siemens Siclock Tc400 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-4855?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-4855 published?: CVE-2018-4855 was published on 2018-07-03 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:siemens:siclock_tc400_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:siclock_tc100_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Siemens Siclock Tc400 Firmware

CVE-2018-4853 — Critical (CVSS 9.8): A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with…
CVE-2018-4852 — Critical (CVSS 9.8): A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with…
CVE-2018-4854 — High (CVSS 8.8): A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with…
CVE-2018-4851 — High (CVSS 8.2): A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with…
CVE-2018-4856 — Medium (CVSS 4.9): A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with…

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