VULNERABILITY INTELLIGENCE

CVE-2021-42766

CVSS score9.1 CRITICAL
EPSS probability0.96%
CISA KEVNot currently listed
Published2021-10-20
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Description

The Proof-of-Stake (PoS) Ethereum consensus protocol through 2021-10-19 allows an adversary to cause a denial of service (long-range consensus chain reorganizations), even when this adversary has little stake and cannot influence network message propagation. This can cause a protocol stall, or an increase in the profits of individual validators.

Weakness classification

  • nvd@nist.gov: NVD-CWE-noinfo

Primary references