---
title: "CVE-2026-71456: Johnson Controls Kantech Entrapass - Broken Cryptography"
description: "Johnson Controls Kantech Entrapass < 9.20 contains a hardcoded cryptographic key vulnerability caused by use of fixed cryptographic keys, letting attackers perform padding oracle crypto attacks, exploit requires network access."
url: https://panop.io/threat-heartbeat/CVE-2026-71456/
---

# CVE-2026-71456 Johnson Controls Kantech Entrapass - Broken Cryptography

Johnson Controls Kantech Entrapass < 9.20 contains a hardcoded cryptographic key vulnerability caused by use of fixed cryptographic keys, letting attackers perform padding oracle crypto attacks, exploit requires network access.

CVSS base score 8.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-71456)

## Details

Type

Broken Cryptography

Impact

Information Disclosure, Data Tampering

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

26 October 2026

Updated

27 October 2026

Weakness

[CWE-321](https://cwe.mitre.org/data/definitions/321.html)

## Vendor fix

Update to version 9.20 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-71456](https://nvd.nist.gov/vuln/detail/CVE-2026-71456)
- [https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories](https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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