CVE-2026-50103

MEDIUM 6.5

Improper Handling of Syntactically Invalid Structure in MZ Automation libIEC61850

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-228
Vendor	mz automation
Product	libiec61850
Published	Jul 23, 2026

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CVSS v3 Breakdown

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

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

MZ Automation / libIEC61850

1.0.0 ≤ 1.6.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Abhinav Agarwal reported this vulnerability to CISA