CVE-2026-54997 Details
Description
Use of uninitialized resource in Windows SMB allows an authorized attacker to disclose information locally.
A vulnerability in Windows Server and Windows 10 SMB implementation allows authorized attackers to locally disclose information due to the use of uninitialized resources. This issue affects several versions and builds across different Windows products.
Users can apply the security update provided by Microsoft. This update is available through the Microsoft Update Catalog. Specific update details can be found in the Microsoft Knowledge Base articles KB5099538, KB5099539, KB5099540, KB5099444, KB5099445, KB5099535, KB5101649, KB5101650, and KB5099536.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54997 | [email protected] | PatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-908 | Use of Uninitialized Resource | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft windows 10 1607 | < 10.0.14393.9339 |
CPE
Remediation
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| microsoft windows 10 1809 | < 10.0.17763.9020 |
CPE
Remediation
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| microsoft windows 10 21h2 | < 10.0.19044.7548 |
CPE
Remediation
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| microsoft windows 10 22h2 | < 10.0.19045.7548 |
CPE
Remediation
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| microsoft windows 11 24h2 | < 10.0.26100.8875 |
CPE
Remediation
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| microsoft windows 11 25h2 | < 10.0.26200.8875 |
CPE
Remediation
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| microsoft windows 11 26h1 | < 10.0.28000.2525 |
CPE
Remediation
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| microsoft windows server 2012 | r2 |
CPE
Remediation
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| microsoft windows server 2016 | < 10.0.14393.9339 |
CPE
Remediation
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| microsoft windows server 2019 | < 10.0.17763.9020 |
CPE
Remediation
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| microsoft windows server 2022 | < 10.0.20348.5386 |
CPE
Remediation
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| microsoft windows server 2025 | < 10.0.26100.33158 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 20, 2026 | Initial Analysis | [email protected] |
| Jul 16, 2026 | CVE Modified | CISA-ADP |
| Jul 14, 2026 | New CVE Received | [email protected] |