Authenticated network privilege escalation
Published Jul 14, 2026 · Updated Jul 14, 2026
Authentication failure in Microsoft Windows SMB Server allows remote authenticated users to elevate privileges over a network. Microsoft identifies an incorrectly implemented authentication algorithm but has not disclosed the affected code path or invalid operation. Existing SMB credentials are required; successful exploitation grants elevated privileges on the targeted Windows host.
Summary
What happened
Authentication failure in Microsoft Windows SMB Server allows remote authenticated users to elevate privileges over a network. Microsoft identifies an incorrectly implemented authentication algorithm but has not disclosed the affected code path or invalid operation. Existing SMB credentials are required; successful exploitation grants elevated privileges on the targeted Windows host.
The record
- CVE
- CVE-2026-50360
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-303, T1068
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 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=10.0.26100.0 <10.0.26100.33158
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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