CVE-2023-2262Network attack vector

Remote code execution via email object overflow

Published Sep 20, 2023 · Updated Sep 25, 2024

Stack-based buffer overflow in Rockwell Automation 1756-EN modules allows remote attackers to execute code via a crafted CIP request. The email object processes request-controlled data without adequate stack-buffer bounds enforcement. No authentication or user interaction is required, and successful exploitation executes code on the communication module.

CVSS severity9.8
Critical
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Rockwell Automation 1756-EN modules allows remote attackers to execute code via a crafted CIP request. The email object processes request-controlled data without adequate stack-buffer bounds enforcement. No authentication or user interaction is required, and successful exploitation executes code on the communication module.

The record

CVE
CVE-2023-2262
Published
Sep 20, 2023
Updated
Sep 25, 2024
Vendor
Rockwell Automation
Product
1756-EN3TR
Classifications
CWE-121, T0866
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=<=11.003
  2. Affected versionversion=<=5.008 & 5.028

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rockwell Automation · 1756-EN3TRversion=<=11.003; version=<=5.008 & 5.028
Rockwell Automation · 1756-EN2TRKversion=<=11.002; version=<=5.008 & 5.028
Rockwell Automation · 1756-EN2Tversion=<=11.002; version=<=5.008 & 5.028
Rockwell Automation · 1756-EN2TPXTversion=<=11.002
Rockwell Automation · 1756-EN2TRversion=<=11.002; version=<=5.008 & 5.028
Rockwell Automation · 1756-EN2TPKversion=<=11.002
Rockwell Automation · 1756-EN2FKversion=<=11.002; version=<=5.008 & 5.028
Rockwell Automation · 1756-EN2Fversion=<=11.002; version=<=5.008 & 5.028
Rockwell Automation · 1756-EN2TPversion=<=11.002
Rockwell Automation · 1756-EN2TRXTversion=<=11.002; version=<=5.008 & 5.028
Rockwell Automation · 1756-EN2TKversion=<=5.008 & 5.028
Rockwell Automation · 1756-EN2TXTversion=<=11.002; version=<=5.008 & 5.028
Rockwell Automation · 1756-EN3TRKversion=<=11.002; version=<=5.008 & 5.028
Rockwell Automation · 1756-EN2FK Firmwareversion=0 <=11.0002; version=5.008 <=5.028

Published CVSS scores

9.8Rockwell AutomationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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-121Stack-based Buffer Overflow
T0866Exploitation 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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