CVE-2021-27662
KT-1 Capture-replay
HIGH
8.1
CVSS Score
Published: September 15, 2021 at 12:04 PM UTC
Updated: June 17, 2026 at 03:45 AM UTC
2 products affected across 1 vendorKantech Kt 1 Door Controller FirmwareKantech Kt 1-door Controller
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Severity
HIGH8.1
Exploit prediction
EPSS 0.8%
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
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v ≤ 3.01
johnsoncontrols-kantech-kt-1-door-controller (same device)
all versions up to and including 3.01 ≤ v ≤ 3.01
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
Third Party Advisoryx_refsource_CERTUS Government Resource
Source: [email protected]
https://us-cert.gov/ics/advisoriesx_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.johnsoncontrols.com/cyber-solutions/security-advisoriesCVSS
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-294
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