CVE-2026-19206 MZ Automation libiec61850 ASDU Element sv_subscriber.c SVReceiver_stopThreadless heap-based overflow
A local attacker can trigger a heap-based buffer overflow in libiec61850, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19206?
CVE-2026-19206 is a medium-severity memory corruption vulnerability in MZ Automation libiec61850, published on 7 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security flaw has been discovered in MZ Automation libiec61850 up to 1.6.1. This affects the function SVReceiver_stopThreadless of the file src/sampled_values/sv_subscriber.c of the component ASDU Element Handler. Performing a manipulation results in heap-based buffer overflow. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.2 is able to mitigate this issue. The patch is named a96bd674e0238276dd1387d31d52e55229d0771e. The affected component should be upgraded.
Which versions are affected by CVE-2026-19206?
How do I fix CVE-2026-19206?
No fix has been published for CVE-2026-19206 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-19206 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19206 exists.
Sources
Also known as GHSA-72v3-v5v5-6xx3.