CVE-2026-50103

MEDIUM

Improper Handling of Syntactically Invalid Structure in MZ Automation libIEC61850

Title source: cna

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.

References (1)

Core 1

Core References

Government Resource government-resource

https://www.cisa.gov/news-events/ics-advisories/icsa-26-204-06

Scores

CVSS v3 6.5

EPSS 0.0016

EPSS Percentile 6.1%

Attack Vector ADJACENT_NETWORK

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-228

Status published

Products (1)

MZ Automation/libIEC61850 1.0.0 - 1.6.1

Published Jul 23, 2026

Tracked Since Jul 24, 2026