How severe is CVE-2018-4859?

CVE-2018-4859 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-4859 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-4859?

CVE-2018-4859 affects Siemens Scalance M875 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-4859?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-4859 published?

CVE-2018-4859 was published on 2018-06-26 and last updated on 2026-06-17.

CVE-2018-4859

CVE-2018-4859 is a high-severity vulnerability in Siemens Scalance M875 Firmware with a CVSS 3.x base score of 7.2. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Siemens Scalance M875 Firmware
Published: 2018-06-26
Last modified: 2026-06-17

Description

A vulnerability has been identified in SCALANCE M875 (All versions). An authenticated remote attacker with access to the web interface (443/tcp), could execute arbitrary operating system commands. Successful exploitation requires that the attacker has network access to the web interface. The attacker must be authenticated as administrative user to exploit the security vulnerability. The vulnerability could allow an attacker to execute arbitrary code on the device. At the time of advisory publication no public exploitation of this security vulnerability was known.

Frequently asked questions

What is CVE-2018-4859?: A vulnerability has been identified in SCALANCE M875 (All versions). An authenticated remote attacker with access to the web interface (443/tcp), could execute arbitrary operating system commands. Successful exploitation requires that the attacker has network access to the web interface. The attacker must be authenticated as administrative user to exploit the security vulnerability. The vulnerability could allow an attacker to execute arbitrary code on the device. At the time of advisory publication no public exploitation of this security vulnerability was known.
How severe is CVE-2018-4859?: CVE-2018-4859 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-4859 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-4859?: CVE-2018-4859 affects Siemens Scalance M875 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-4859?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-4859 published?: CVE-2018-4859 was published on 2018-06-26 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-977428.pdf

Affected products (1)

cpe:2.3:o:siemens:scalance_m875_firmware:*:*:*:*:*:*:*:*

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CVE-2018-11447 — High (CVSS 8.8): A vulnerability has been identified in SCALANCE M875 (All versions). The web interface on port 443/tcp could allow a…
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