MEDIUMVulnerability
CVE-2026-66720
The GOOSE subscriber component improperly validates the UTC timestamp field in unauthenticated IEC 61850 GOOSE (EtherType 0x88B8) Layer-2 multicast messages. A specially crafted GOOSE frame containing an undersized timestamp field can trigger a heap out-of-bounds read during message processing, causing the process to crash and resulting in a denial-of-service condition.
Properties
- severity
- MEDIUM
- score
- 6.5
- epss_score
- 0.00175
- cve_id
- CVE-2026-66720
- vector
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- published_at
- 2026-07-30T23:16:53.830
- last_modified
- 2026-09-03T17:58:18.790
- epss_percentile
- 0.07021
Related Entities (3)
ENRICHED_BY (1)
→[Source]FIRST EPSS
HAS_WEAKNESS (1)
→[Weakness]Out-of-bounds Read
DESCRIBED_BY (1)
→[Source]NVD
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