What is CVE-2026-19108?

CVE-2026-19108 is a medium-severity vulnerability in Mz Automation Libiec61850, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-08-06.

How severe is CVE-2026-19108?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Buffer overflow in Mz Automation Libiec61850

CVE-2026-19108

A vulnerability was found in MZ Automation libiec61850 up to 1.6.1. The affected element is the function deleteDataSetValuesShadowBuffer of the file src/iec61850/server/mms_mapping/reporting.c of the component URCB Revalidation. The manipulation results in use after free. The attack needs to be approached locally. The exploit has been made public and could be used. Upgrading to version 1.6.2 is sufficient to fix this issue. The patch is identified as 486fd57f3aed65bb9d636ff00f9ddce2e450b168. Upgrading the affected component is advised.

Vulnerability class: Buffer Overflow

Published 2026-08-06 · last modified 2026-10-23.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.002 (5.0th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Mz Automation Libiec61850 — versions 1.6.0, 1.6.1, 1.6.2

Weakness classification (CWE)

References

github.com/mz-automation/libiec61850/commit/486fd57f3aed65bb9d636ff00f9ddce2e45… (patch)
github.com/mz-automation/libiec61850/issues/596 (issue-tracking)
github.com/mz-automation/libiec61850/releases/tag/v1.6.2 (patch)
github.com/user-attachments/files/29163236/POC.zip (exploit)
vuldb.com/cve/CVE-2026-19108 (third-party-advisory)
vuldb.com/submit/864520 (third-party-advisory)
vuldb.com/vuln/386569 (technical-description, vdb-entry)
vuldb.com/vuln/386569/cti (signature, permissions-required)

Frequently asked questions

What is CVE-2026-19108?: CVE-2026-19108 is a medium-severity vulnerability in Mz Automation Libiec61850, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-08-06.
How severe is CVE-2026-19108?: Medium severity. CVSS v3 base score is 5.3 out of 10.