Vulnerability · Published Jul 23, 2026 · Assigned by icscert
CVE-2026-50039Stack-based Buffer Overflow in MZ Automation libIEC61850
High 7.5
In plain English
A high-severity stack buffer overflow in libIEC61850 from MZ Automation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 60.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MZ Automation | libIEC61850 | 1.0.0 – through 1.6.1 |
Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-204-06 government-resource