AUGUST 4, 2026
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Case File

CVE-2021-42766

CRITICAL · CVSS 9.1 EPSS 0.93%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-20 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-42766
Severity
CRITICAL
CVSS
9.1
EPSS
0.93%

Original NVD 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.