CVE-2026-47300: CWE-303: Incorrect Implementation of Authentication Algorithm in Microsoft .NET 10.0
Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-47300) affects Microsoft .NET 10.0 and is classified under CWE-303 for incorrect implementation of authentication algorithms. The issue resides in ASP.NET Core where the authentication mechanism is flawed, enabling an attacker with some level of authorization to escalate their privileges remotely. The CVSS v3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker can exploit this vulnerability to elevate privileges over a network, potentially gaining higher access rights than intended. This can lead to full compromise of affected systems running .NET 10.0, impacting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47300 to remediate this vulnerability.
CVE-2026-47300: CWE-303: Incorrect Implementation of Authentication Algorithm in Microsoft .NET 10.0
Description
Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
CVSS v3.1
Score 8.8high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-47300) affects Microsoft .NET 10.0 and is classified under CWE-303 for incorrect implementation of authentication algorithms. The issue resides in ASP.NET Core where the authentication mechanism is flawed, enabling an attacker with some level of authorization to escalate their privileges remotely. The CVSS v3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker can exploit this vulnerability to elevate privileges over a network, potentially gaining higher access rights than intended. This can lead to full compromise of affected systems running .NET 10.0, impacting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47300 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-18T23:53:33.897Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47300","vendor":"Microsoft"}]
Threat ID: 6a56811c68715ace43005273
Added to database: 07/14/2026, 18:34:04 UTC
Last enriched: 07/14/2026, 18:47:40 UTC
Last updated: 07/14/2026, 19:33:56 UTC
Views: 6
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