CVE-2026-27871Network attack vector

Sensitive-information access via hardcoded firmware credentials

Published Aug 14, 2026 · Updated Aug 14, 2026

Risky cryptography in Johnson Controls TL280 before 5.63 allows remote authenticated users to access sensitive device information. The device firmware hardcodes authentication information directly in its source, but the credential and cryptographic operation are undisclosed. Network access, high privileges, high attack complexity, and additional attack conditions are required; no broader consequence is published.

CVSS severity4.1
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Risky cryptography in Johnson Controls TL280 before 5.63 allows remote authenticated users to access sensitive device information. The device firmware hardcodes authentication information directly in its source, but the credential and cryptographic operation are undisclosed. Network access, high privileges, high attack complexity, and additional attack conditions are required; no broader consequence is published.

The record

CVE
CVE-2026-27871
Published
Aug 14, 2026
Updated
Aug 14, 2026
Vendor
Johnson Controls
Product
TL280
Classifications
CWE-327
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.63

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Johnson Controls · TL280version=0 <5.63

Published CVSS scores

4.1CISACVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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