Local information disclosure via undisclosed USBX flaw
Published Nov 10, 2021 · Updated Aug 19, 2026
Information disclosure in the USBX component of Microsoft Azure RTOS before 6.1.9 allows local users to read unspecified information. Microsoft has not published the vulnerable USBX operation or how it processes untrusted input. Exploitation requires local access and user interaction; published metrics limit the reported consequence to confidentiality loss.
Summary
What happened
Information disclosure in the USBX component of Microsoft Azure RTOS before 6.1.9 allows local users to read unspecified information. Microsoft has not published the vulnerable USBX operation or how it processes untrusted input. Exploitation requires local access and user interaction; published metrics limit the reported consequence to confidentiality loss.
The record
- CVE
- CVE-2021-26444
- Published
- Nov 10, 2021
- Updated
- Aug 19, 2026
- Vendor
- Microsoft
- Product
- Azure RTOS
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 10, 2021CVE publishedPublication date reported by the CVE source.
- Aug 19, 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.
- Affected versionversion=6.0.0 <6.1.9
What conditions does exploitation require?
What is affected?
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
No sourced classifications are available.
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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