CVE-2017-5140
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 · uneditedAn issue was discovered in Honeywell XL Web II controller XL1000C500 XLWebExe-2-01-00 and prior, and XLWeb 500 XLWebExe-1-02-08 and prior. Password is stored in clear text.
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 confidenceThe Honeywell XL Web II controller (XL1000C500) and XLWeb 500 controllers store user passwords in cleartext without any encryption or hashing. This critical vulnerability allows anyone with access to the device's storage or memory to retrieve plaintext credentials, enabling full authentication bypass and unauthorized control access.
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= xlwebexe-1-02-08= xlwebexe-2-01-00CVSS 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
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/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 Honeywell XL Web controller modelAccess the device web interface or check the device label to confirm the model number is XL1000C500 or XLWeb 500Affected if Model is XL1000C500 or XLWeb 500
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Check the firmware versionAccess the device web interface or check the xlwebexe version file to determine if version is xlwebexe-1-02-08 or xlwebexe-2-01-00Affected if Firmware version matches xlwebexe-1-02-08 or xlwebexe-2-01-00
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Locate password configuration storageAccess the device file system or configuration files where user credentials are stored (typically in device memory or configuration storage)Affected if Password configuration files exist on the device
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Inspect stored credentials for encryptionOpen the password storage location and examine whether credentials appear as plaintext or are obfuscated/encrypted/hashedAffected if Passwords are stored in readable plaintext without any encryption or hashing mechanism
The device is affected if it is an XL1000C500 or XLWeb 500 controller running firmware version xlwebexe-1-02-08 or xlwebexe-2-01-00, and plaintext passwords can be retrieved from device storage.
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 dataImmediately change all default and stored passwords to strong, unique credentials. Contact Honeywell for firmware updates that address the cleartext storage issue, and implement network segmentation to limit exposure of these ICS controllers.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-5140 — 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-2017-5140 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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