How severe is CVE-2020-9044?

CVE-2020-9044 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-9044 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9044?

CVE-2020-9044 primarily affects Johnsoncontrols Metasys Application And Data Server. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-9044?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-9044 published?

CVE-2020-9044 was published on 2020-03-10 and last updated on 2026-06-17.

CVE-2020-9044

CVE-2020-9044 is a high-severity vulnerability in Johnsoncontrols Metasys Application And Data Server with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-611.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 6.4
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Johnsoncontrols Metasys Application And Data Server
Published: 2020-03-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-9044?: 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.
How severe is CVE-2020-9044?: CVE-2020-9044 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-9044 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9044?: CVE-2020-9044 primarily affects Johnsoncontrols Metasys Application And Data Server. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-9044?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-9044 published?: CVE-2020-9044 was published on 2020-03-10 and last updated on 2026-06-17.

References

Affected products (27)

cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:*:*:*:*:*:*:*:*
cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:*:*:*:*:lite:*:*:*
cpe:2.3:a:johnsoncontrols:metasys_extended_application_and_data_server:*:*:*:*:*:*:*:*
cpe:2.3:a:johnsoncontrols:metasys_lonworks_control_server:*:*:*:*:*:*:*:*
cpe:2.3:a:johnsoncontrols:metasys_open_application_server:10.1:*:*:*:*:*:*:*
cpe:2.3:a:johnsoncontrols:metasys_open_data_server:*:*:*:*:*:*:*:*
cpe:2.3:a:johnsoncontrols:metasys_system_configuration_tool:*:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nae55_firmware:9.0.1:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nae55_firmware:9.0.2:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nae55_firmware:9.0.3:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nae55_firmware:9.0.5:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nae55_firmware:9.0.6:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie55_firmware:9.0.1:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie55_firmware:9.0.2:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie55_firmware:9.0.3:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie55_firmware:9.0.5:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie55_firmware:9.0.6:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie59_firmware:9.0.1:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie59_firmware:9.0.2:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie59_firmware:9.0.3:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie59_firmware:9.0.5:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie59_firmware:9.0.6:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nae85_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nie85_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:nae55_firmware:8.1:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:ul_864_uukl_firmware:8.1:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:ord-c100-13_uuklc_firmware:8.1:*:*:*:*:*:*:*

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