AUGUST 4, 2026
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Case File

CVE-2021-21777

CRITICAL · CVSS 10 EPSS 1.67%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-06-17 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 10.0. See the original NVD description below for full technical details.

CVE
CVE-2021-21777
Severity
CRITICAL
CVSS
10
EPSS
1.67%

Original NVD Description

An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3. A specially crafted network request can lead to an out-of-bounds read.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2022-43606 HIGH CVE-2022-43605 CRITICAL CVE-2022-43604 CRITICAL CVE-2022-32434 HIGH CVE-2021-27500 HIGH CVE-2021-27498 HIGH