CVE-2026-50039 Stack-based Buffer Overflow in MZ Automation libIEC61850
A stack-based buffer overflow in libIEC61850 allows attackers to cause memory corruption via Read Requests, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-50039?
CVE-2026-50039 is a high-severity memory corruption vulnerability in MZ Automation libIEC61850, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The affected product is vulnerable to a stack-based buffer overflow, which may allow an attacker to cause a memory corruption via a Read Request.
Weakness: CWE-121
Which versions are affected by CVE-2026-50039?
How do I fix CVE-2026-50039?
No fix has been published for CVE-2026-50039 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-2026-50039 being exploited?
There is no known exploitation of CVE-2026-50039 in the wild and no public exploit code.
Sources
Also known as GHSA-mv2j-6f62-xx62.