What is CVE-2026-48741?

CVE-2026-48741 is a high-severity vulnerability in Mz-Automation Libiec61850, classified under Improper Validation of Array Index. CVSS score: 7.5/10. Published 2026-10-16.

How severe is CVE-2026-48741?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Mz-Automation Libiec61850

CVE-2026-48741

libIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session. Prior to 1.6.2, alternateArrayAccess in src/mms/iso_mms/server/mms_read_service.c does not validate an alternate-access sub-array range when numberOfElements is greater than zero. An out-of-range MmsValue_getElement call returns NULL, and the sub-array branch passes that value to MmsValue_isDeletable, causing a NULL pointer dereference. A remote MMS Read request can therefore crash servers whose data models contain arrays, while the single-element error path handles the same invalid index safely. This issue is fixed in version 1.6.2.

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Mz-Automation Libiec61850 — versions < 1.6.2

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-48741?: CVE-2026-48741 is a high-severity vulnerability in Mz-Automation Libiec61850, classified under Improper Validation of Array Index. CVSS score: 7.5/10. Published 2026-10-16.
How severe is CVE-2026-48741?: High severity. CVSS v3 base score is 7.5 out of 10.