CVE-2021-27662

The KT-1 door controller is susceptible to replay or man-in-the-middle attacks where an attacker can record and replay TCP packets. This issue affects Johnson Controls KT-1 all versions up to and including 3.01

• https://us-cert.gov/ics/advisories
  Third Party AdvisoryUS Government Resource
• https://www.johnsoncontrols.com/cyber-solutions/security-advisories
  Vendor Advisory
• https://us-cert.gov/ics/advisories
  Third Party AdvisoryUS Government Resource
• https://www.johnsoncontrols.com/cyber-solutions/security-advisories
  Vendor Advisory