.NET
CVE-2026-69651 — .NET Denial of Service Vulnerability
Executive Summary
Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.
Overview
7.5
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.5
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
41 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| .NET 10.0 installed on Linux | 5130036 (Security Update) |
Important | Denial of Service | Unknown |
| .NET 10.0 installed on Mac OS | 5130036 (Security Update) |
Important | Denial of Service | Unknown |
| .NET 10.0 installed on Windows | 5130036 (Security Update) |
Important | Denial of Service | Unknown |
| .NET 11.0 installed on Linux | Release Notes (Security Update) |
Important | Denial of Service | Unknown |
| .NET 11.0 installed on Mac OS | Release Notes (Security Update) |
Important | Denial of Service | Unknown |
| .NET 11.0 installed on Windows | Release Notes (Security Update) |
Important | Denial of Service | Unknown |
| .NET 8.0 installed on Linux | 5130034 (Security Update) |
Important | Denial of Service | Unknown |
| .NET 8.0 installed on Mac OS | 5130034 (Security Update) |
Important | Denial of Service | Unknown |
| .NET 8.0 installed on Windows | 5130034 (Security Update) |
Important | Denial of Service | Unknown |
| .NET 9.0 installed on Linux | 5130035 (Security Update) |
Important | Denial of Service | Unknown |
| .NET 9.0 installed on Mac OS | 5130035 (Security Update) |
Important | Denial of Service | Unknown |
| .NET 9.0 installed on Windows | 5130035 (Security Update) |
Important | Denial of Service | Unknown |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 version 1607 | 5126868 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 | 5126868 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2019 | 5127666 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 version 1809 | 5127666 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 1809 | 5127685 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 21H2 | 5127683 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 22H2 | 5127683 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 | 5127685 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 | 5127687 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 21H2 | 5127689 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 22H2 | 5127689 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 23H2 | 5127692 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 24H2 | 5127690 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 25H2 | 5127690 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H2 | 5127694 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 | 5127693 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 | 5127690 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 on Windows 11 version 26H1 | 5127696 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 on Windows Server 2012 | 5127660 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 on Windows Server 2012 R2 | 5127664 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 | 5127667 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 | 5127668 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 4.8 on Windows 10 version 1607 | 5127684 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2012 | 5127686 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2012 R2 | 5127688 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2016 | 5127684 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1 | 5127691 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft Visual Studio 2022 version 17.14 | Release Notes (Security Update) |
Important | Denial of Service | Yes |
| Microsoft Visual Studio 2026 version 18.10 | Release Notes (Security Update) |
Important | Denial of Service | Yes |
Patches
23 patches
| Article | Type | Restart |
|---|---|---|
5130036 |
Security Update | Unknown |
Release Notes |
Security Update | Unknown |
5130034 |
Security Update | Unknown |
5130035 |
Security Update | Unknown |
5126868 |
Security Update | Maybe |
5127666 |
Security Update | Maybe |
5127685 |
Security Update | Maybe |
5127683 |
Security Update | Maybe |
5127687 |
Security Update | Maybe |
5127689 |
Security Update | Maybe |
5127692 |
Security Update | Maybe |
5127690 |
Security Update | Maybe |
5127694 |
Security Update | Maybe |
5127693 |
Security Update | Maybe |
5127696 |
Security Update | Maybe |
5127660 |
Security Update | Maybe |
5127664 |
Security Update | Maybe |
5127667 |
Security Update | Maybe |
5127668 |
Security Update | Maybe |
5127684 |
Security Update | Maybe |
5127686 |
Security Update | Maybe |
5127688 |
Security Update | Maybe |
5127691 |
Security Update | Maybe |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
References
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