.NET Spoofing Vulnerability
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Microsoft | .NET 10.0 | affected |
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| Microsoft | .NET 8.0 | affected |
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| Microsoft | .NET 9.0 | affected |
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Configuration 1 [-]
| AND |
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No data.
| Vendor | Product | Versions | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | .net |
|
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-qvhc-9v3j-5rfw | Microsoft Security Advisory CVE-2026-21218 | .NET Security Feature Bypass Vulnerability |
Ubuntu USN |
USN-8025-1 | .NET vulnerability |
Ubuntu USN |
USN-8025-2 | .NET vulnerability |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.997% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Apple
Apple macos Linux Linux linux Kernel Microsoft windows |
|
| CPEs | cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* |
|
| Vendors & Products |
Apple
Apple macos Linux Linux linux Kernel Microsoft windows |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network. | |
| Title | .NET Spoofing Vulnerability | |
| First Time appeared |
Microsoft
Microsoft .net |
|
| Weaknesses | CWE-166 | |
| CPEs | cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Microsoft
Microsoft .net |
|
| References |
| |
| Metrics |
cvssV3_1
|