CVE-2021-36204

Plaintext credential exposure through API calls

Published Jan 13, 2023 · Updated Apr 7, 2025

Credential exposure in Johnson Controls Metasys ADS/ADX/OAS 10 and 11 allows attackers to obtain plaintext credentials through API calls. Under certain undisclosed circumstances, Metasys Server API responses return credentials without sufficient protection. Exploitation requires local access and user interaction; the vendor has not disclosed the affected endpoint or triggering request.

CVSS severity7.5
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential exposure in Johnson Controls Metasys ADS/ADX/OAS 10 and 11 allows attackers to obtain plaintext credentials through API calls. Under certain undisclosed circumstances, Metasys Server API responses return credentials without sufficient protection. Exploitation requires local access and user interaction; the vendor has not disclosed the affected endpoint or triggering request.

The record

CVE
CVE-2021-36204
Published
Jan 13, 2023
Updated
Apr 7, 2025
Vendor
Johnson Controls
Product
Metasys
Classifications
CWE-522, T1552
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2025Record 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=All 10 versions <10.1.6
  2. Affected versionversion=All 11 versions <11.0.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Johnson Controls · Metasysversion=All 10 versions <10.1.6; version=All 11 versions <11.0.3

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.8Johnson ControlsCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-522Insufficiently Protected Credentials
T1552Unsecured Credentials

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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