What is CVE-2019-19958?

CVE-2019-19958 is a medium-severity vulnerability in Mz-Automation Libiec61850, classified under Incorrect Conversion between Numeric Types. CVSS score: 6.5/10. Published 2019-12-24.

How severe is CVE-2019-19958?

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

Resource exhaustion in Mz-Automation Libiec61850

CVE-2019-19958

In libIEC61850 1.4.0, StringUtils_createStringFromBuffer in common/string_utilities.c has an integer signedness issue that could lead to an attempted excessive memory allocation and denial of service.

Published 2019-12-24 · 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: 0.009 (59.4th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Mz-Automation Libiec61850 — versions 1.4.0

Weakness classification (CWE)

References

github.com/mz-automation/libiec61850/issues/198 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-19958?: CVE-2019-19958 is a medium-severity vulnerability in Mz-Automation Libiec61850, classified under Incorrect Conversion between Numeric Types. CVSS score: 6.5/10. Published 2019-12-24.
How severe is CVE-2019-19958?: Medium severity. CVSS v3 base score is 6.5 out of 10.