What is CVE-2026-57446?

CVE-2026-57446 is a medium-severity vulnerability in Mz-Automation Libiec61850, classified under Double Free. CVSS score: 5.3/10. Published 2026-10-16.

How severe is CVE-2026-57446?

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

Double Free in Mz-Automation Libiec61850

CVE-2026-57446

libIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session. From 1.6.1 until 1.6.2, a successful MMS ObtainFile operation closes MmsObtainFileTask::fileHandle but leaves the stale non-NULL value in a task marked MMS_FILE_UPLOAD_STATE_NOT_USED. If a later ObtainFile request reuses that task and destination creation fails, MMS_FILE_UPLOAD_STATE_SEND_OBTAIN_FILE_ERROR_DESTINATION cleanup closes the stale FILE object again. Servers with the MMS file service and ObtainFile enabled can therefore be crashed remotely by the success-then-failure request sequence. This issue is fixed in version 1.6.2.

Vulnerability class: Double Free

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

CVSS v3 metric

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

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 >= 1.6.1, < 1.6.2

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-57446?: CVE-2026-57446 is a medium-severity vulnerability in Mz-Automation Libiec61850, classified under Double Free. CVSS score: 5.3/10. Published 2026-10-16.
How severe is CVE-2026-57446?: Medium severity. CVSS v3 base score is 5.3 out of 10.