CVE-2023-2262
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA buffer overflow vulnerability exists in the Rockwell Automation select 1756-EN* communication devices. If exploited, a threat actor could potentially leverage this vulnerability to perform a remote code execution. To exploit this vulnerability, a threat actor would have to send a maliciously crafted CIP request to device.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceA buffer overflow vulnerability exists in Rockwell Automation 1756-EN* series communication modules that allows remote code execution via maliciously crafted CIP (Common Industrial Protocol) requests. The vulnerability stems from insufficient bounds checking when the device parses incoming CIP request packets, enabling an attacker to overflow buffers and execute arbitrary code.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 5.008, <= 5.028>= 5.008, <= 5.028>= 5.008, <= 5.028<= 11.002>= 5.008, <= 5.028>= 5.008, <= 5.028>= 5.008, <= 5.028>= 5.008, <= 5.028CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the device modelLocate the 1756-EN* module physically or via RSLinx/FactoryTalk Device Manager. Confirm the exact model number is 1756-EN2t, 1756-EN2tk, or 1756-EN2txt.Affected if The device model is one of these three series.
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Determine the firmware versionAccess the module via the web interface, RSLinx Classic, or FactoryTalk Linx. Navigate to the device properties or firmware revision field to obtain the installed firmware version.Affected if Firmware version is >= 5.008 and <= 5.028 for Series A/B/C, or <= 11.002 for Series D.
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Verify CIP protocol is enabledCheck the module configuration in RSLinx or FactoryTalk Linx. Confirm that CIP (Common Industrial Protocol) communication is enabled in the module settings.Affected if CIP is enabled (this is the default operational state for these modules).
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Review network exposureExamine network firewall rules and segmentation. Determine if the module is directly accessible from untrusted networks or the internet.Affected if The module has unrestricted access from untrusted networks.
The environment is affected if the device is a 1756-EN2t, EN2tk, or EN2txt module running firmware within the listed vulnerable version ranges and CIP protocol is operational, regardless of network exposure.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply Rockwell Automation's firmware updates when available; implement network segmentation and firewall rules to limit exposure to untrusted networks; consider CIP security features such as CIP Security if supported by the device and infrastructure.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-2262 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-2262 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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