Local security bypass via unauthenticated MDM function
Published Sep 8, 2026 · Updated Sep 9, 2026
Missing authentication in Windows Modern Device Management allows local users to bypass a security feature on affected Windows releases. Microsoft identifies a critical MDM function that fails to authenticate its caller but does not disclose the function, request, or code path. A low-privileged local account is required, and successful exploitation can alter security state without disclosing data or interrupting service.
Summary
What happened
Missing authentication in Windows Modern Device Management allows local users to bypass a security feature on affected Windows releases. Microsoft identifies a critical MDM function that fails to authenticate its caller but does not disclose the function, request, or code path. A low-privileged local account is required, and successful exploitation can alter security state without disclosing data or interrupting service.
The record
- CVE
- CVE-2026-69674
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-306, T1562.001
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 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=10.0.17763.0 <10.0.17763.9245
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
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Your stack
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