What is CVE-2021-36200?

CVE-2021-36200 is a medium-severity vulnerability in Johnson Controls Metasys Ads/adx/oas Server, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2022-07-22.

How severe is CVE-2021-36200?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Johnson Controls Metasys Ads/adx/oas Server

CVE-2021-36200

Under certain circumstances an unauthenticated user could access the the web API for Metasys ADS/ADX/OAS 10 versions prior to 10.1.6 and 11 versions prior to 11.0.2 and enumerate users.

Vulnerability class: Broken Authentication

Published 2022-07-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.000

Affected products

Johnson Controls Metasys Ads/adx/oas Server — versions All 10 versions, All 11 versions
Johnsoncontrols Metasys Application And Data Server
Johnsoncontrols Metasys Extended Application And Data Server
Johnsoncontrols Metasys Open Application Server

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.johnsoncontrols.com/cyber-solutions/security-advisories (Vendor Advisory)
www.cisa.gov/uscert/ics/advisories/icsa-22-202-02 (US Government Resource, Third Party Advisory, Mitigation, third-party-advisory)

Frequently asked questions

What is CVE-2021-36200?: CVE-2021-36200 is a medium-severity vulnerability in Johnson Controls Metasys Ads/adx/oas Server, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2022-07-22.
How severe is CVE-2021-36200?: Medium severity. CVSS v3 base score is 5.3 out of 10.