CVE-2022-43604Network attack vector

Remote code execution via unchecked attribute count

Published Mar 16, 2023 · Updated Mar 5, 2025

Out-of-bounds write in OpENer development commit 58ee13c allows remote attackers to crash the server or execute code via EtherNet/IP requests. GetAttributeList trusts the request-controlled attribute_count_request as a loop bound; counts above 0x80 advance the response pointer beyond the EnipMessage buffer before AddIntToMessage writes attacker-supplied values. Network access to the EtherNet/IP service is sufficient, and exploitation can corrupt the stack, terminate the process, or execute code without authentication or user interaction.

CVSS severity10.0
Critical
EPSS probability14.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in OpENer development commit 58ee13c allows remote attackers to crash the server or execute code via EtherNet/IP requests. GetAttributeList trusts the request-controlled attribute_count_request as a loop bound; counts above 0x80 advance the response pointer beyond the EnipMessage buffer before AddIntToMessage writes attacker-supplied values. Network access to the EtherNet/IP service is sufficient, and exploitation can corrupt the stack, terminate the process, or execute code without authentication or user interaction.

The record

CVE
CVE-2022-43604
Published
Mar 16, 2023
Updated
Mar 5, 2025
Vendor
EIP Stack Group
Product
OpENer
Classifications
CWE-787, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=development commit 58ee13c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

EIP Stack Group · OpENerversion=development commit 58ee13c

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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