Vulnerability in Johnson Controls Kt-1
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
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L.
EPSS exploit prediction
EPSS: 0.008 (56.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Johnson Controls Kt-1 — versions all versions up to and including 3.01
- Johnsoncontrols Kantech Kt-1 Door Controller
- Johnsoncontrols Kantech Kt-1 Door Controller Firmware
Weakness classification (CWE)
References
- www.johnsoncontrols.com/cyber-solutions/security-advisories (Vendor Advisory)
- us-cert.gov/ics/advisories (US Government Resource, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2021-27662?
- CVE-2021-27662 is a high-severity vulnerability in Johnson Controls Kt-1, classified under Authentication Bypass by Capture-replay. CVSS score: 8.6/10. Published 2021-09-15.
- How severe is CVE-2021-27662?
- High severity. CVSS v3 base score is 8.6 out of 10.