Quick answers
- Is CVE-2026-50032 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-50032 being exploited in the wild.
- How severe is CVE-2026-50032?
- High severity, with a CVSS score of 7.5, published 23 July 2026.
- Which products and versions are affected?
- MZ Automation libIEC61850 >=1.0.0, <=1.6.1.
- Is there a fix for CVE-2026-50032?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-50032 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-50032?
- 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.
Technical details
A NULL pointer dereference (CWE-476) exists in the Manufacturing Message Specification (MMS) Write Named Variable List handler of libIEC61850. The vulnerability is triggered when the server receives a 'WriteRequest' containing an empty 'listOfData' field. An unauthenticated, network-adjacent or remote attacker (depending on network configuration) can exploit this to cause a crash of the service, resulting in a denial-of-service (DoS). The issue affects versions 1.0.0 through 1.6.1. Users are advised to update to the latest build from the vendor's repository to remediate the flaw.
Affected products
- MZ Automation libIEC61850 >=1.0.0, <=1.6.1
Timeline
- 2026-07-23: disclosed
- 2026-07-23: advisory: Initial publication by CISA (ICSA-26-204-06)