Disclosure summary
Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network.
Source-reported weakness categories
CWE-166
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Feb
Open original source · Updated Feb 10, 2026
.NET Spoofing Vulnerability
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 7.5
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | .NET 10.0 installed on Mac OS | (MSRC status code 3) |
| Microsoft update guide | .NET 10.0 installed on Windows | (MSRC status code 3) |
| Microsoft update guide | .NET 8.0 installed on Linux | (MSRC status code 3) |
| Microsoft update guide | .NET 8.0 installed on Windows | (MSRC status code 3) |
| Microsoft update guide | .NET 10.0 installed on Linux | (MSRC status code 3) |
| Microsoft update guide | .NET 8.0 installed on Mac OS | (MSRC status code 3) |
| Microsoft update guide | .NET 9.0 installed on Mac OS | (MSRC status code 3) |
| Microsoft update guide | .NET 9.0 installed on Linux | (MSRC status code 3) |
| Microsoft update guide | .NET 9.0 installed on Windows | (MSRC status code 3) |
Vendor remediation references
- 5077862 · build 10.0.3 · product IDs 20838, 20837, 20839
- Vendor guidance · product IDs 20838, 20837, 20839
- 5077863 · build 8.0.24 · product IDs 12415, 12414, 12416
- Vendor guidance · product IDs 12415, 12414, 12416
- 5077864 · build 9.0.13 · product IDs 12433, 12432, 12434
- Vendor guidance · product IDs 12433, 12432, 12434
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-02-10T03:00:00-05:00
MODIFIED 2026-02-10T03:00:00-05:00
INGESTED 2026-10-08T12:45:18-04:00