CVE Catalog

CVE-2026-66364

MediumCVSS 6.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.18%

7th percentile - higher than 7% of all known CVEs

Summary

The GOOSE payload parser contains a boundary handling flaw that can be triggered by a single unauthenticated Layer 2 multicast frame on the process bus. When processing specific payload fields, an attacker controlled inner element length may exceed its enclosing length, causing the parser to over read by one byte. This out-of-bounds read reliably terminates the subscriber process, resulting in a denial-of-service condition.

Risk Assessment

An attacker can remotely crash the GOOSE subscriber process, disrupting communication in power automation systems and potentially causing power supply interruptions.

Recommendation

Install the update provided by the power automation system vendor that fixes the boundary handling flaw in the GOOSE payload parser.

Related vulnerabilities

Original NVD description (English source)

The GOOSE payload parser contains a boundary handling flaw that can be triggered by a single unauthenticated Layer 2 multicast frame on the process bus. When processing specific payload fields, an attacker controlled inner element length may exceed its enclosing length, causing the parser to over read by one byte. This out-of-bounds read reliably terminates the subscriber process, resulting in a denial-of-service condition.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS