Unauthenticated spoofing via undisclosed authorization failure
Published Aug 12, 2025 · Updated Feb 13, 2026
Missing authorization in Microsoft Remote Desktop Server on affected Windows releases allows remote attackers to spoof users over a network. Microsoft has not published a file, function, request field, or authorization decision responsible for the flaw. No authentication or user interaction is required; successful exploitation can disclose or alter data but does not interrupt service.
Summary
What happened
Missing authorization in Microsoft Remote Desktop Server on affected Windows releases allows remote attackers to spoof users over a network. Microsoft has not published a file, function, request field, or authorization decision responsible for the flaw. No authentication or user interaction is required; successful exploitation can disclose or alter data but does not interrupt service.
The record
- CVE
- CVE-2025-50171
- Published
- Aug 12, 2025
- Updated
- Feb 13, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-862
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 12, 2025CVE publishedPublication date reported by the CVE source.
- Feb 13, 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 <10.0.26100.4946
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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