Vulnerability · Published Jul 23, 2026 · Assigned by icscert
CVE-2026-50103Improper Handling of Syntactically Invalid Structure in MZ Automation libIEC61850
Medium 6.5
In plain English
A medium-severity security flaw 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 0.3% (higher than 19% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 80.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A NULL pointer dereference in the L2 GOOSE and R-GOOSE shared parser, which may allow a network-adjacent attacker to crash a subscribing application by sending a crafted GOOSE frame containing a malformed TLV value.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MZ Automation | libIEC61850 | 1.0.0 – through 1.6.1 |
Weakness: CWE-228 · Vector: CVSS:3.1/AV:A/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