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TI-2021-09110 Aliases CVE-2021-27662GHSA-fv2j-64xc-r4hr

KT-1 Capture-replay

Priority LOW 39CWE-294Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · High · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-294.

Summary

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

Why it matters now

EPSS 0.00841 58th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Johnson ControlsKT-1all versions up to and including 3.01 – 3.01—No fix listedCNA
  • KT-1 VendorJohnson Controls Affected all versions up to and including 3.01 – 3.01 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:johnsoncontrols:kantech_kt-1_door_controller_firmware:*:*:*:*:*:*:*:*up to 3.01VulnerableJohnson Controls
cpe:2.3:h:johnsoncontrols:kantech_kt-1_door_controller:-:*:*:*:*:*:*:*not specified by NVDRunning onJohnson Controls
  • cpe:2.3:o:johnsoncontrols:kantech_kt-1_door_controller_firmware:*:*:*:*:*:*:*:* Versions up to 3.01 Vulnerable ·Johnson Controls
  • cpe:2.3:h:johnsoncontrols:kantech_kt-1_door_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Johnson Controls

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-27662
  2. 2026-10-03 Alias added: GHSA-fv2j-64xc-r4hr

References

Advisory 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences