PT-2026-66633 · Mz Automation Gmbh · Libiec61850

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CVE-2026-66369

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Published

2026-07-30

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Updated

2026-07-30

CVSS v3.1

6.5

Medium

VectorAV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The GOOSE parser contains an off-by-one boundary-handling flaw that can be triggered by a single unauthenticated Layer-2 multicast frame on the process bus. When specific GOOSE message fields are processed, the parser advances its internal buffer position incorrectly, resulting in a heap out-of-bounds read. On affected platforms, this condition reliably terminates the subscriber process and causes a denial-of-service.

Fix

Out of bounds Read

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Weakness Enumeration

Related Identifiers

CVE-2026-66369

Affected Products

Libiec61850