Is CVE-2026-68908 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-68908 being exploited in the wild.

How severe is CVE-2026-68908?

Medium severity, with a CVSS score of 5.3, published 16 October 2026.

Which products and versions are affected?

MZ Automation libIEC61850 before 1.6.2.

Is there a fix for CVE-2026-68908?

Yes: fixed in 1.6.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-68908 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-68908?

Check whether you run MZ Automation libIEC61850 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-68908: libIEC61850 invalid free in MMS report serialization

CVE-2026-68908 · Severity: medium · CVSS 5.3 · Published 2026-10-16

libIEC61850 is an open-source library implementing industrial power grid communication protocols (IEC 61850). A remote attacker can crash the MMS server by writing an oversized report identifier (RptID) and then triggering report generation, exploiting a stack-based buffer management flaw that leads to an invalid memory free operation.

Technologies: MZ Automation libIEC61850. Vendors: MZ Automation.

Quick answers

Is CVE-2026-68908 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-68908 being exploited in the wild.
How severe is CVE-2026-68908?: Medium severity, with a CVSS score of 5.3, published 16 October 2026.
Which products and versions are affected?: MZ Automation libIEC61850 before 1.6.2.
Is there a fix for CVE-2026-68908?: Yes: fixed in 1.6.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-68908 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-68908?: Check whether you run MZ Automation libIEC61850 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 1.6.2

Technical details

The vulnerability exists in Reporting_RCBWriteAccessHandler which accepts an RptID longer than 129 bytes without validation. When report serialization occurs via sendNextReportEntrySegment, a stack buffer (rptIdBuf[130]) is passed to MmsValue_setVisibleString which incorrectly frees the stack-backed memory. The issue is triggered remotely via MMS protocol when a write to the report-control-block is followed by report generation.

Affected products

mz-automation libIEC61850 before 1.6.2

Timeline

2026-10-16: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.