What is CVE-2021-36205?

CVE-2021-36205 is a high-severity vulnerability in Johnson Controls Metasys, classified under Incomplete Cleanup. CVSS score: 8.1/10. Published 2022-04-15.

How severe is CVE-2021-36205?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Johnson Controls Metasys

CVE-2021-36205

Under certain circumstances the session token is not cleared on logout.

Published 2022-04-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000

Affected products

Johnson Controls Metasys — 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-459 — Incomplete Cleanup

References

www.johnsoncontrols.com/cyber-solutions/security-advisories (Vendor Advisory)
www.cisa.gov/uscert/ics/advisories/icsa-22-104-02 (US Government Resource, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2021-36205?: CVE-2021-36205 is a high-severity vulnerability in Johnson Controls Metasys, classified under Incomplete Cleanup. CVSS score: 8.1/10. Published 2022-04-15.
How severe is CVE-2021-36205?: High severity. CVSS v3 base score is 8.1 out of 10.