Authenticated service interruption via unthrottled SMB allocation
Published Sep 8, 2026 · Updated Sep 9, 2026
Resource exhaustion in Microsoft Windows SMB Server allows remote authenticated users to interrupt service through network requests. The server allocates resources while processing authenticated SMB traffic without imposing limits or throttling; Microsoft has not disclosed the resource type or code locus. An attacker must authenticate and reach the SMB service over a network; successful exploitation exhausts resources without reported data access or modification.
Summary
What happened
Resource exhaustion in Microsoft Windows SMB Server allows remote authenticated users to interrupt service through network requests. The server allocates resources while processing authenticated SMB traffic without imposing limits or throttling; Microsoft has not disclosed the resource type or code locus. An attacker must authenticate and reach the SMB service over a network; successful exploitation exhausts resources without reported data access or modification.
The record
- CVE
- CVE-2026-69374
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-770, T1499
- Attack vector
- network
- 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?
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- Affected versionversion=10.0.26100.0 <10.0.26100.33438
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
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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