How severe is CVE-2018-19121?

CVE-2018-19121 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2018-19121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-19121?

CVE-2018-19121 affects Mz-automation Libiec61850. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-19121?

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

When was CVE-2018-19121 published?

CVE-2018-19121 was published on 2018-11-09 and last updated on 2026-06-17.

CVE-2018-19121

CVE-2018-19121 is a medium-severity vulnerability in Mz-automation Libiec61850 with a CVSS 3.x base score of 4.3. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Mz-automation Libiec61850
Published: 2018-11-09
Last modified: 2026-06-17

Description

An issue has been found in libIEC61850 v1.3. It is a SEGV in Ethernet_receivePacket in ethernet_bsd.c.

Frequently asked questions

What is CVE-2018-19121?: An issue has been found in libIEC61850 v1.3. It is a SEGV in Ethernet_receivePacket in ethernet_bsd.c.
How severe is CVE-2018-19121?: CVE-2018-19121 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2018-19121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-19121?: CVE-2018-19121 affects Mz-automation Libiec61850. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-19121?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-19121 published?: CVE-2018-19121 was published on 2018-11-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mz-automation:libiec61850:1.3:*:*:*:*:*:*:*

More vulnerabilities in Mz-automation Libiec61850

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Other CWE-476 (NULL Pointer Dereference) vulnerabilities

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CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
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