CVE-2021-27482 - CVE House
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Status published High CVE-2021-27482

EIPStackGroup OpENer Ethernet/IP Out-of-bounds Read

Vulnerability Description

A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may allow the attacker to read arbitrary data.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Tal Keren and Sharon Brizinov of Claroty reported these vulnerabilities to CISA.

References

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CVE-2021-27498
EIPStackGroup OpENer Ethernet/IP Reachable Assertion
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CVE-2021-27478
EIPStackGroup OpENer Ethernet/IP Incorrect Conversion between Numeric Types
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Affected Vendor

EIPStackGroup

View all reports →

Affected Software

OpENer EtherNet/IP
Vulnerable Versions:
unspecified

Timeline

Official Publish: May 12th, 2022
Last Modified: April 16th, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weaknesses (CWE)

CWE-125

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1213 Data from Information Repositories
Collection
T1003 OS Credential Dumping
Credential Access
T1552 Unsecured Credentials
Credential Access