CVE-2014-9201
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 · uneditedBeckwith Electric M-6200 Digital Voltage Regulator Control with firmware before D-0198V04.07.00, M-6200A Digital Voltage Regulator Control with firmware before D-0228V02.01.07, M-2001D Digital Tapchanger Control with firmware before D-0214V01.10.04, M-6283A Three Phase Digital Capacitor Bank Control with firmware before D-0346V03.00.02, M-6280A Digital Capacitor Bank Control with firmware before D-0254V03.05.05, and M-6280 Digital Capacitor Bank Control do not properly generate TCP initial sequence number (ISN) values, which makes it easier for remote attackers to spoof TCP sessions by predicting an ISN value.
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 confidenceBeckwith Electric digital voltage regulator and capacitor bank control devices use a weak TCP Initial Sequence Number (ISN) generation algorithm that produces predictable sequence numbers. This allows remote attackers to perform TCP session spoofing or hijacking by predicting the next ISN value in the TCP three-way handshake.
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 versions<= 01.10.04<= 04.07.00CVSS 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
- Partial
- Integrity
- None
- Availability
- Partial
AV:N/AC:L/Au:N/C:P/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 device modelAccess the device management interface or check device labeling to confirm the exact model (M 2001d, M 6200, M 6200a, M 6280, M 6280a, or M 6283a)Affected if The device is any of these Beckwith Electric models listed as affected
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Check the firmware versionLog into the device web interface or console and navigate to the firmware/version information section. For M 2001d, look for D 0214 firmware version. For M 6200, look for D 0198 firmware version.Affected if Firmware version is <= 01.10.04 for M 2001d (D 0214) or <= 04.07.00 for M 6200 (D 0198), or if the device is any other affected model running any firmware version
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Confirm TCP services are exposedScan the device network ports using nmap or similar tool to identify open TCP ports (common industrial protocols may use ports 502, 102, or custom ports)Affected if The device has accessible TCP ports exposed on the network
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Verify network accessibilityDetermine if the affected device TCP ports are reachable from untrusted network segments or the internetAffected if The device TCP services are reachable from network segments outside the trusted control network
The environment is affected if any Beckwith Electric M 2001d, M 6200, M 6200a, M 6280, M 6280a, or M 6283a device with vulnerable firmware is exposed on the network, since the weak ISN algorithm affects all versions of these devices.
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 dataUpdate affected device firmware to the specified minimum versions (D-0198V04.07.00, D-0228V02.01.07, D-0214V01.10.04, D-0346V03.00.02, or D-0254V03.05.05 depending on model). If immediate patching is not feasible, implement network segmentation and add encryption/authentication layers (TLS, IPSec) to protect TCP sessions.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2014-9201 — 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-2014-9201 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
- No weaponised exploit code, or anything meant to cause harm
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