What is CVE-2018-19121?

CVE-2018-19121 is a medium-severity vulnerability in Mz-Automation Libiec61850, classified under NULL Pointer Dereference. CVSS score: 4.3/10. Published 2018-11-09.

How severe is CVE-2018-19121?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2018-19121 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Mz-Automation Libiec61850

CVE-2018-19121

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

Published 2018-11-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.012 (68.1th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Mz-Automation Libiec61850 — versions 1.3

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

References

github.com/fouzhe/security/tree/master/libiec61850 (Exploit, Third Party Advisory)
github.com/mz-automation/libiec61850/issues/85 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-19121?: CVE-2018-19121 is a medium-severity vulnerability in Mz-Automation Libiec61850, classified under NULL Pointer Dereference. CVSS score: 4.3/10. Published 2018-11-09.
How severe is CVE-2018-19121?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2018-19121 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.