CVE-2013-2763
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 · uneditedThe Schneider Electric M340 PLC modules allow remote attackers to cause a denial of service (resource consumption) via unspecified vectors. NOTE: the vendor reportedly disputes this issue because it "could not be duplicated" and "an attacker could not remotely exploit this observed behavior to deny PLC control functions.
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 · low confidenceThe Schneider Electric M340 PLC modules contain a denial of service vulnerability where remote attackers can cause resource consumption, potentially rendering the PLC unresponsive. The specific attack vectors are unspecified in the available documentation.
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 dataall versionsall versionsall versionsall versionsall versionsall versionsall versionsall versionsCVSS 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
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Partial
AV:N/AC:L/Au:N/C:N/I:N/A:P
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 PLC modelQuery the PLC hardware configuration or check the physical module labels to determine the catalog number. Look for module identifiers such as Bmx Noc, Bmx Noe, Bmx Nor, or Bmx P34.Affected if The module catalog number matches Bmx Noc 0401, Bmx Noe 0100, Bmx Noe 0100h, Bmx Noe 0110, Bmx Noe 0110h, Bmx Nor 0200h, Bmx P34 2010, or Bmx P34 2030.
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Verify the firmware versionAccess the PLC programming software (such as Unity Pro or EcoStruxure) and read the firmware version from the module properties, or query the PLC via its management interface.Affected if The firmware version corresponds to any of the affected module catalog numbers listed above, regardless of version number (all versions are affected).
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Check network exposure of the PLCReview network diagrams and firewall rules to determine whether the PLC module is directly accessible from untrusted networks or the internet.Affected if The PLC management or protocol ports (such as Modbus/TCP on port 502) are exposed to untrusted networks without firewall protection.
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Monitor for resource exhaustion symptomsReview PLC runtime logs and network monitoring tools for signs of unusual traffic volume, repeated connection attempts, or PLC communication failures indicating potential denial of service.Affected if The PLC exhibits unexplained communication failures, slow response, or becomes unresponsive while the affected module is in use.
You are affected if your environment contains a Schneider Electric Modicon M340 PLC with any of the following module catalog numbers: Bmx Noc 0401, Bmx Noe 0100, Bmx Noe 0100h, Bmx Noe 0110, Bmx Noe 0110h, Bmx Nor 0200h, Bmx P34 2010, or Bmx P34 2030, regardless of firmware version.
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 dataNetwork segmentation and firewall policies should isolate PLCs from untrusted networks; implement monitoring for anomalous traffic patterns that could indicate resource exhaustion attempts. Coordinate with Schneider Electric for any available firmware updates or security advisories.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2013-2763 — 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-2013-2763 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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