CVE-2026-50360: CWE-303: Incorrect Implementation of Authentication Algorithm in Microsoft Windows 10 Version 21H2
Incorrect implementation of authentication algorithm in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-50360) is due to an incorrect implementation of the authentication algorithm in the Windows SMB Server component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). It enables an attacker with existing authorization to elevate their privileges remotely over the network. The CVSS 3.1 base score is 8.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
An authorized attacker can exploit this vulnerability to elevate privileges on the affected Windows 10 system remotely via the SMB protocol. This can lead to full system compromise, including complete control over confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Microsoft has released an official patch to fix this vulnerability. It is strongly recommended to apply the official update available at the Microsoft Security Response Center advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50360) to remediate the issue. No additional mitigation steps are indicated beyond applying the official fix.
CVE-2026-50360: CWE-303: Incorrect Implementation of Authentication Algorithm in Microsoft Windows 10 Version 21H2
Description
Incorrect implementation of authentication algorithm in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-50360) is due to an incorrect implementation of the authentication algorithm in the Windows SMB Server component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). It enables an attacker with existing authorization to elevate their privileges remotely over the network. The CVSS 3.1 base score is 8.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
An authorized attacker can exploit this vulnerability to elevate privileges on the affected Windows 10 system remotely via the SMB protocol. This can lead to full system compromise, including complete control over confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Microsoft has released an official patch to fix this vulnerability. It is strongly recommended to apply the official update available at the Microsoft Security Response Center advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50360) to remediate the issue. No additional mitigation steps are indicated beyond applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-04T18:48:26.815Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50360","vendor":"Microsoft"}]
Threat ID: 6a56769468715ace43f08d5d
Added to database: 07/14/2026, 17:49:08 UTC
Last enriched: 08/13/2026, 14:39:46 UTC
Last updated: 08/28/2026, 11:04:21 UTC
Views: 74
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