CVE-2017-5140 Honeywell CVE debrief

Who should care

OT and ICS defenders using Honeywell XL Web II controller products, especially operators responsible for credential storage, local system hardening, backups, images, and maintenance access. Security teams should also care if these controllers are reachable from shared networks or remote support paths.

Technical summary

Per the NVD record, the affected products are Honeywell XL Web II controller XL1000C500 running XLWebExe-2-01-00 and prior, and XLWeb 500 running XLWebExe-1-02-08 and prior. The weakness is credential exposure through cleartext storage, which aligns with CWE-522. The CVSS 3.0 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating a remotely reachable issue with severe potential impact if the stored password is obtained or abused.

Defensive priority

High. The record is rated CVSS 9.8/CRITICAL, and the weakness involves a password stored without adequate protection. Even without an exploit chain in the corpus, credential disclosure in controller software can have immediate operational and security consequences.

Recommended defensive actions

• Identify whether any Honeywell XL Web II controller installations match the affected versions listed in NVD.
• Treat any recovered or exposed credentials associated with these devices as compromised and rotate them using vendor-supported procedures.
• Review where controller credentials may be stored, copied, backed up, or exported, including maintenance workstations and configuration archives.
• Restrict access to controller management interfaces and credential storage locations to trusted administrative networks and personnel.
• Monitor for unauthorized use of controller accounts and investigate any unexpected administrative activity.
• Follow the vendor or ICS advisory guidance referenced by NVD for available remediation steps and version-specific updates.

Evidence notes

This debrief is based on the supplied NVD-derived record and its official reference links. The record explicitly states that a password is stored in clear text and identifies affected versions as XLWebExe-2-01-00 and prior for XL1000C500, and XLWebExe-1-02-08 and prior for XLWeb 500. NVD lists CWE-522 and CVSS 3.0 vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The corpus includes reference links to CVE.org, NVD, and ICS-CERT advisory metadata, but not the full advisory text, so remediation details are kept general and strictly evidence-based.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.