CVE-2021-27661

Successful exploitation of this vulnerability could give an authenticated Facility Explorer SNC Series Supervisory Controller (F4-SNC) user an unintended level of access to the controller’s file system, allowing them to access or modify system files by sending specifically crafted web messages to the F4-SNC.

• CWE-269
• CWE-863

• https://us-cert.cisa.gov/ics/advisories/icsa-21-182-01Third Party Advisory, US Government Resource
• https://www.johnsoncontrols.com/cyber-solutions/security-advisoriesVendor Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-182-01Third Party Advisory, US Government Resource
• https://www.johnsoncontrols.com/cyber-solutions/security-advisoriesVendor Advisory

Published

Jul 1, 2021

Last Modified

Jun 17, 2026

Status

Modified

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