VULNERABILITY INTELLIGENCE
CVE-2026-66364
CVSS score6.5 MEDIUM
EPSS probability0.29%
CISA KEVNot currently listed
Published2026-07-30
Last modified2026-09-03
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
Weakness classification
- ics-cert@hq.dhs.gov: CWE-125