Authentication Bypass by Capture-replay in Johnson Controls Sensormatic Electronics KT-1

Published: 2021-09-15
Risk High
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-27662
Exploitation vector Network
Public exploit N/A
Vulnerable software
Hardware solutions / Other hardware appliances

Vendor Johnson Controls

Security Advisory

This security advisory describes one high risk vulnerability.

1) Authentication Bypass by Capture-replay

Risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-27662

CWE-ID: CWE-294 - Authentication Bypass by Capture-replay

Exploit availability: No


The vulnerability allows a remote attacker to bypass authentication on the target system.

The vulnerability exists due to improper authentication process. A remote attacker can perform replay attacks on the target system.


Install updates from vendor's website.

Vulnerable software versions

KT-1: 3.01

CPE External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.