CVE-2020-9044Metasys Improper Restriction of XML External Entity Reference
- 7.5HighCVSS base score
- 1.3%Exploitation in 30 daysEPSS · top 29% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By jci
- 21 days later
· 21 days later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| jciCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.3% · top 29% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
Johnson Controls · Metasys Application and Data Server (ADS, ADS-Lite)
- affected versions 10.1 and prior
Johnson Controls · Metasys Extended Application and Data Server (ADX)
- affected versions 10.1 and prior
Johnson Controls · Metasys Open Data Server (ODS)
- affected versions 10.1 and prior
Johnson Controls · Metasys Open Application Server (OAS)
- affected version 10.1
Johnson Controls · Metasys Network Automation Engine (NAE55 only)
- affected versions 9.0.1
- affected 9.0.2
- affected 9.0.3
- affected 9.0.5
- affected 9.0.6
Johnson Controls · Metasys Network Integration Engine (NIE55/NIE59)
- affected versions 9.0.1
- affected 9.0.2
- affected 9.0.3
- affected 9.0.5
- affected 9.0.6
Johnson Controls · Metasys NAE85 and NIE85
- affected versions 10.1 and prior
Johnson Controls · Metasys LonWorks Control Server (LCS)
- affected versions 10.1 and prior
Johnson Controls · Metasys System Configuration Tool (SCT)
- affected versions 13.2 and prior
Johnson Controls · Metasys Smoke Control Network Automation Engine (NAE55, UL 864 UUKL/ORD-C100-13 UUKLC 10th Edition Listed)
- affected version 8.1
What to do
Solution: Johnson Controls has developed a patch to address this issue. Customers should contact their local branch office for remediation.
References
References2
- https://www.johnsoncontrols.com/cyber-solutions/security-advisories (opens in a new tab)x_refsource_CONFIRMx_transferred
- ICS-CERT Advisory (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-29873 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-9044)Record last updated .