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TI-2026-33261 Aliases CVE-2026-45490GHSA-77gm-m6x5-jf4f

.NET SDK Elevation of Privilege Vulnerability

Priority LOW 36CWE-285Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

Improper authorization in .NET allows an authorized attacker to elevate privileges locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00384 32nd percentileScored 2026-11-07
Fix Fixed Microsoft: 3 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Microsoft.NET 10.010.0.0 to before 10.0.910.0.9Patch availableCNA
Microsoft.NET 8.08.0.0 to before 8.0.288.0.28Patch availableCNA
Microsoft.NET 9.09.0.0 to before 9.0.179.0.17Patch availableCNA
  • .NET 10.0 VendorMicrosoft Affected 10.0.0 to before 10.0.9 Fixed in 10.0.9 Patch available CNA
  • .NET 8.0 VendorMicrosoft Affected 8.0.0 to before 8.0.28 Fixed in 8.0.28 Patch available CNA
  • .NET 9.0 VendorMicrosoft Affected 9.0.0 to before 9.0.17 Fixed in 9.0.17 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*8.0.0 to before 8.0.28; 9.0.0 to before 9.0.17; 10.0.0 to before 10.0.9VulnerableMicrosoft
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.0.28; 9.0.0 to before 9.0.17; 10.0.0 to before 10.0.9 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

Microsoft 3 updates

  • KB5097150
    Security Update
    • .NET 9.0 installed on Linux 9.0.17
    • .NET 9.0 installed on Mac OS 9.0.17
    • .NET 9.0 installed on Windows 9.0.17
    • ASP.NET Core 9.0 9.0.17
  • KB5097149
    Security Update
    • .NET 8.0 8.0.28
    • .NET 8.0 installed on Linux 8.0.28
    • .NET 8.0 installed on Mac OS 8.0.28
    • .NET 8.0 installed on Windows 8.0.28
    • ASP.NET Core 8.0 8.0.28
  • KB5097148
    Security Update
    • .NET 10.0 installed on Linux 10.0.9
    • .NET 10.0 installed on Mac OS 10.0.9
    • .NET 10.0 installed on Windows 10.0.9
    • ASP.NET Core 10.0 10.0.9

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 4 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Hardened Images

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45490
  2. 2026-10-03 Alias added: GHSA-77gm-m6x5-jf4f

References

Patch 1

  • TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-19596 .NET and Visual Studio Denial of Service Vulnerability KEVCVSS 3.1HIGH 7.5
  • TI-2023-19588 Microsoft QUIC Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2024-14152 .NET and Visual Studio Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2021-08380 .NET Core Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
See all 129 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences