What’s Vulnerable › Vulnerabilities

CVE-2020-9044: Metasys Improper Restriction of XML External Entity Reference

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-03-10 · updated 2026-06-17
• Weakness: CWE-611

Description

XXE vulnerability exists in the Metasys family of product Web Services which has the potential to facilitate DoS attacks or harvesting of ASCII server files. This affects Johnson Controls' Metasys Application and Data Server (ADS, ADS-Lite) versions 10.1 and prior; Metasys Extended Application and Data Server (ADX) versions 10.1 and prior; Metasys Open Data Server (ODS) versions 10.1 and prior; Metasys Open Application Server (OAS) version 10.1; Metasys Network Automation Engine (NAE55 only) versions 9.0.1, 9.0.2, 9.0.3, 9.0.5, 9.0.6; Metasys Network Integration Engine (NIE55/NIE59) versions 9.0.1, 9.0.2, 9.0.3, 9.0.5, 9.0.6; Metasys NAE85 and NIE85 versions 10.1 and prior; Metasys LonWorks Control Server (LCS) versions 10.1 and prior; Metasys System Configuration Tool (SCT) versions 13.2 and prior; Metasys Smoke Control Network Automation Engine (NAE55, UL 864 UUKL/ORD-C100-13 UUKLC 10th Edition Listed) version 8.1.

Affected products

• Johnsoncontrols Metasys Application And Data Server: through 10.1
• Johnsoncontrols Metasys Extended Application And Data Server: through 10.1
• Johnsoncontrols Metasys Lonworks Control Server: through 10.1
• Johnsoncontrols Metasys Open Application Server: 10.1
• Johnsoncontrols Metasys Open Data Server: through 10.1
• Johnson Controls System Configuration Tool (SCT): through 13.2
• Johnsoncontrols Nae55 Firmware: 9.0.1, 9.0.2, 9.0.3, 9.0.5, 9.0.6, 8.1
• Johnsoncontrols Nae85 Firmware: through 10.1
• Johnsoncontrols Nie55 Firmware: 9.0.1, 9.0.2, 9.0.3, 9.0.5, 9.0.6
• Johnsoncontrols Nie59 Firmware: 9.0.1, 9.0.2, 9.0.3, 9.0.5, 9.0.6
• Johnsoncontrols Nie85 Firmware: through 10.1
• Johnsoncontrols Ord-C100-13 Uuklc Firmware: 8.1
• Johnsoncontrols Ul 864 Uukl Firmware: 8.1

References

• https://www.johnsoncontrols.com/cyber-solutions/security-advisories
• https://www.us-cert.gov/ics/advisories/icsa-20-070-05
• https://www.johnsoncontrols.com/cyber-solutions/security-advisories
• https://www.us-cert.gov/ics/advisories/icsa-20-070-05

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