VULNERABILITY INTELLIGENCE

CVE-2021-27662

CVSS score8.6 HIGH

EPSS probability0.84%

CISA KEVNot currently listed

Published2021-09-15

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Description

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

Weakness classification

productsecurity@jci.com: CWE-294
nvd@nist.gov: CWE-294

Primary references

productsecurity@jci.com — Third Party Advisory, US Government Resource
productsecurity@jci.com — Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory