Vulnerability DatabaseCVE-2026-70197
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CVE-2026-70197
Published:October 13, 2026
Updated:October 15, 2026
Out-of-bounds write in .NET allows an unauthorized attacker to execute code over a network.
Affected Packages
microsoft.netcore.app.runtime.win-arm64 (DOT_NET):
Affected version(s) >=8.0.0 <8.0.32
Fix Suggestion:
Update to version 8.0.32
microsoft.netcore.app.runtime.win-arm64 (DOT_NET):
Affected version(s) >=10.0.0-preview.2.25163.2 <10.0.13
Fix Suggestion:
Update to version 10.0.13
microsoft.netcore.app.runtime.win-x64 (DOT_NET):
Affected version(s) >=8.0.0 <8.0.32
Fix Suggestion:
Update to version 8.0.32
microsoft.netcore.app.runtime.win-x86 (DOT_NET):
Affected version(s) >=8.0.0 <8.0.32
Fix Suggestion:
Update to version 8.0.32
microsoft.netcore.app.runtime.win-arm64 (DOT_NET):
Affected version(s) >=9.0.0 <9.0.21
Fix Suggestion:
Update to version 9.0.21
microsoft.netcore.app.runtime.win-x86 (DOT_NET):
Affected version(s) >=9.0.0 <9.0.21
Fix Suggestion:
Update to version 9.0.21
microsoft.netcore.app.runtime.win-x64 (DOT_NET):
Affected version(s) >=9.0.0 <9.0.21
Fix Suggestion:
Update to version 9.0.21
microsoft.netcore.app.runtime.win-x86 (DOT_NET):
Affected version(s) >=10.0.0-preview.2.25163.2 <10.0.13
Fix Suggestion:
Update to version 10.0.13
microsoft.netcore.app.runtime.win-x64 (DOT_NET):
Affected version(s) >=10.0.0-preview.2.25163.2 <10.0.13
Fix Suggestion:
Update to version 10.0.13
microsoft.netcore.app.runtime.win-x64 (NUGET):
Affected version(s) >=9.0.0 <9.0.21
Fix Suggestion:
Update to version 9.0.21
microsoft.netcore.app.runtime.win-x86 (NUGET):
Affected version(s) >=9.0.0 <9.0.21
Fix Suggestion:
Update to version 9.0.21
microsoft.netcore.app.runtime.win-arm64 (NUGET):
Affected version(s) >=9.0.0 <9.0.21
Fix Suggestion:
Update to version 9.0.21
microsoft.netcore.app.runtime.win-x86 (NUGET):
Affected version(s) >=10.0.0 <10.0.13
Fix Suggestion:
Update to version 10.0.13
microsoft.netcore.app.runtime.win-x64 (NUGET):
Affected version(s) >=10.0.0 <10.0.13
Fix Suggestion:
Update to version 10.0.13
microsoft.netcore.app.runtime.win-arm64 (NUGET):
Affected version(s) >=10.0.0 <10.0.13
Fix Suggestion:
Update to version 10.0.13
microsoft.netcore.app.runtime.win-x64 (NUGET):
Affected version(s) >=8.0.0 <8.0.32
Fix Suggestion:
Update to version 8.0.32
microsoft.netcore.app.runtime.win-arm64 (NUGET):
Affected version(s) >=8.0.0 <8.0.32
Fix Suggestion:
Update to version 8.0.32
microsoft.netcore.app.runtime.win-x86 (NUGET):
Affected version(s) >=8.0.0 <8.0.32
Fix Suggestion:
Update to version 8.0.32
Related Resources (6)
https://github.com/dotnet/runtime/security/advisories/GHSA-4mpw-cpwj-hxxj
https://nvd.nist.gov/vuln/detail/CVE-2026-70197
https://github.com/dotnet/runtime/issues/135702
https://github.com/dotnet/announcements/issues/466
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70197
https://github.com/dotnet/runtime
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CVSS v4
Base Score:
9.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Exploit Maturity
UNPROVEN
Weakness Type (CWE)
Out-of-bounds Write
CWE-787
EPSS
Base Score:
0.69