CVE-2026-44102
Deferred Deferred - Pending Action

Firmware Update File Access in OCPP Backend

Publication date: 2026-07-30

Last updated on: 2026-07-30

Assigner: CERT VDE

Description
An unauthenticated remote attacker can trigger a firmware update download via the OCPP backend by supplying an invalid firmware file. This will cause the file to remain accessible for a short period before it is deleted due to improper locking during the cleanup process.

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Meta Information

Published
2026-07-30
Last Modified
2026-07-30
Generated
2026-08-19
AI Q&A
2026-07-30
EPSS Evaluated
2026-08-18
NVD
CVE-2026-44102
EUVD
EUVD-2026-51037

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

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Executive Summary

This vulnerability allows an unauthenticated remote attacker to trigger a firmware update download by sending an invalid file to the OCPP backend. Due to improper locking during cleanup, the invalid file remains accessible briefly before deletion.

Detection Guidance

This vulnerability involves an unauthenticated remote attacker triggering a firmware update download via the OCPP backend with an invalid file. Detection may involve monitoring network traffic for unexpected firmware update requests or file access patterns. Check OCPP backend logs for unusual firmware update triggers or file access events during cleanup periods.

Impact Analysis

An attacker could exploit this to cause temporary file exposure or denial of service by disrupting firmware update processes. The impact is limited due to the short window of file accessibility.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized access to firmware files during a brief window before deletion. Unauthorized access to sensitive data or system files may violate confidentiality requirements under these regulations.

Mitigation Strategies

Implement proper file locking mechanisms during firmware update cleanup processes to prevent unauthorized access to temporary files. Ensure firmware update endpoints validate file integrity and reject invalid files before processing.

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