How severe is CVE-2021-36204?

CVE-2021-36204 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-36204 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36204?

CVE-2021-36204 primarily affects Johnsoncontrols Metasys Application And Data Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-36204?

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-2021-36204 published?

CVE-2021-36204 was published on 2023-01-13 and last updated on 2026-06-17.

CVE-2021-36204

CVE-2021-36204 is a high-severity vulnerability in Johnsoncontrols Metasys Application And Data Server with a CVSS 3.x base score of 7.8. 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-522.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Johnsoncontrols Metasys Application And Data Server
Published: 2023-01-13
Last modified: 2026-06-17

Description

Under some circumstances an Insufficiently Protected Credentials vulnerability in Johnson Controls Metasys ADS/ADX/OAS 10 versions prior to 10.1.6 and 11 versions prior to 11.0.3 allows API calls to expose credentials in plain text.

Frequently asked questions

What is CVE-2021-36204?: Under some circumstances an Insufficiently Protected Credentials vulnerability in Johnson Controls Metasys ADS/ADX/OAS 10 versions prior to 10.1.6 and 11 versions prior to 11.0.3 allows API calls to expose credentials in plain text.
How severe is CVE-2021-36204?: CVE-2021-36204 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-36204 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36204?: CVE-2021-36204 primarily affects Johnsoncontrols Metasys Application And Data Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-36204?: 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-2021-36204 published?: CVE-2021-36204 was published on 2023-01-13 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:*:*:*:*:*:*:*:*
cpe:2.3:a:johnsoncontrols:metasys_extended_application_and_data_server:*:*:*:*:*:*:*:*
cpe:2.3:a:johnsoncontrols:metasys_open_application_server:*:*:*:*:*:*:*:*

More vulnerabilities in Johnsoncontrols Metasys Application And Data Server

CVE-2021-36207 — High (CVSS 8.8): Under certain circumstances improper privilege management in Metasys ADS/ADX/OAS servers versions 10 and 11 could allow…
CVE-2022-21937 — High (CVSS 8.7): Under certain circumstances, a vulnerability in Metasys ADS/ADX/OAS 10 versions prior to 10.1.5 and Metasys ADS/ADX/OAS…
CVE-2021-36202 — High (CVSS 8.4): Server-Side Request Forgery (SSRF) vulnerability in Johnson Controls Metasys could allow an authenticated attacker to…
CVE-2022-21938 — High (CVSS 8.1): Under certain circumstances, a vulnerability in Metasys ADS/ADX/OAS 10 versions prior to 10.1.5 and Metasys ADS/ADX/OAS…
CVE-2021-36205 — High (CVSS 8.1): Under certain circumstances the session token is not cleared on logout.
CVE-2022-21934 — High (CVSS 8.0): Under certain circumstances an authenticated user could lock other users out of the system or take over their accounts…

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