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CVE-2026-66364 Detail

Description

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  ICS-CERT
CVSS-B 7.1 HIGH
Vector:  CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
ICS-CERT
ICS-CERT

Weakness Enumeration

CWE-ID CWE Name Source
CWE-125 Out-of-bounds Read ICS-CERT  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-66364
NVD Published Date:
07/30/2026
NVD Last Modified:
07/30/2026
Source:
ICS-CERT