CVE-2021-27663

A vulnerability in versions 10.1 through 10.5 of Johnson Controls CEM Systems AC2000 allows a remote attacker to access to the system without adequate authorization. This issue affects: Johnson Controls CEM Systems AC2000 10.1; 10.2; 10.3; 10.4; 10.5.

• CWE-285

• https://us-cert.gov/ics/advisories/ICSA-21-238-01Third Party Advisory, US Government Resource
• https://www.johnsoncontrols.com/cyber-solutions/security-advisoriesVendor Advisory
• https://us-cert.gov/ics/advisories/ICSA-21-238-01Third Party Advisory, US Government Resource
• https://www.johnsoncontrols.com/cyber-solutions/security-advisoriesVendor Advisory

Published

Aug 30, 2021

Last Modified

Jun 17, 2026

Status

Modified

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