Authenticated parameter modification via unencrypted MQTT topic writes
Published Jan 7, 2026 · Updated Jan 7, 2026
Frail MQTT security in Efacec QC 60/90/120 version 8 allows remote authenticated users to modify charger-control topics. The board exchanges MQTT messages without transport encryption and accepts credentialed topic writes that control its communications. Exploitation requires adjacent-network access, valid credentials, and high-complexity conditions; successful writes can alter critical charger parameters.
Summary
What happened
Frail MQTT security in Efacec QC 60/90/120 version 8 allows remote authenticated users to modify charger-control topics. The board exchanges MQTT messages without transport encryption and accepts credentialed topic writes that control its communications. Exploitation requires adjacent-network access, valid credentials, and high-complexity conditions; successful writes can alter critical charger parameters.
The record
- CVE
- CVE-2026-22535
- Published
- Jan 7, 2026
- Updated
- Jan 7, 2026
- Vendor
- Efacec
- Product
- QC 60/90/120
- Classifications
- CWE-1366, T1565.002
- Attack vector
- adjacent
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 7, 2026CVE publishedPublication date reported by the CVE source.
- Jan 7, 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?
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- Affected versionversion=8
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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