What is CVE-2019-19930?

CVE-2019-19930 is a medium-severity vulnerability in Mz-Automation Libiec61850, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2019-12-23.

How severe is CVE-2019-19930?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Integer overflow in Mz-Automation Libiec61850

CVE-2019-19930

In libIEC61850 1.4.0, MmsValue_newOctetString in mms/iso_mms/common/mms_value.c has an integer signedness error that can lead to an attempted excessive memory allocation.

Vulnerability class: Integer Overflow

Published 2019-12-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Mz-Automation Libiec61850 — versions 1.4.0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

github.com/mz-automation/libiec61850/issues/193 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-19930?: CVE-2019-19930 is a medium-severity vulnerability in Mz-Automation Libiec61850, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2019-12-23.
How severe is CVE-2019-19930?: Medium severity. CVSS v3 base score is 6.5 out of 10.