Malicious file storage via unrestricted upload
Published Jul 31, 2026 · Updated Jul 31, 2026
Unrestricted file upload in Johnson Controls OpenBlue Employee before 2025.3.1 allows remote authenticated users to store malicious files. Johnson Controls has not disclosed the affected upload endpoint or the validation failure that permits dangerous file types. High application privileges and passive interaction by another user are required; malicious uploaded content can expose or alter application data.
Summary
What happened
Unrestricted file upload in Johnson Controls OpenBlue Employee before 2025.3.1 allows remote authenticated users to store malicious files. Johnson Controls has not disclosed the affected upload endpoint or the validation failure that permits dangerous file types. High application privileges and passive interaction by another user are required; malicious uploaded content can expose or alter application data.
The record
- CVE
- CVE-2026-21662
- Published
- Jul 31, 2026
- Updated
- Jul 31, 2026
- Vendor
- Johnson Controls
- Product
- OpenBlue Employee
- Classifications
- CWE-434, CAPEC-17, T1105
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jul 31, 2026CVE publishedPublication date reported by the CVE source.
- Jul 31, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <2025.3.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo