CVE-2026-96957ImportantSFBNetwork
.NET Security Feature Bypass Vulnerability
Assessment
Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.
- Severity
- Important
- CVSS base score
- 8.8CVSS:3.1/
AV:N/ AC:L/ PR:N/ UI:R/ S:U/ C:H/ I:H/ A:H/ E:U/ RL:O/ RC:C - Impact
- Security Feature Bypass
- EPSS, next 30 days
- Not scored yet
- Public exploit code
- No Nuclei template lists it
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- .NET
- Weakness
- CWE-347: Improper Verification of Cryptographic Signature
- Issued by
- Microsoft
- Published
- 13 Oct 2026 · October 2026
- Last revised
- 13 Oct 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
- Attack vector
- NetworkAV:N
- Attack complexity
- LowAC:L
- Privileges required
- NonePR:N
- User interaction
- RequiredUI:R
- Scope
- UnchangedS:U
- Confidentiality
- HighC:H
- Integrity
- HighI:H
- Availability
- HighA:H
Updates that fix it
1 KB| KB | Type | Applies to | Other CVEs |
|---|---|---|---|
| KB5130036 | Security Update | .NET 10.0 installed on Linux, .NET 10.0 installed on Mac OS, .NET 10.0 installed on Windows | All CVEs in KB5130036 |
Affected products
Developer Tools8 affected products
- .NET 10.0 installed on Linux
- .NET 10.0 installed on Mac OS
- .NET 10.0 installed on Windows
- .NET 11.0 installed on Linux
- .NET 11.0 installed on Mac OS
- .NET 11.0 installed on Windows
- Microsoft Visual Studio 2022 version 17.14
- Microsoft Visual Studio 2026 version 18.10
What changed
First observed 14 Oct 2026No field changes in the recorded history.
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