CVE-2026-70162ImportantDoSNetwork

.NET Denial of Service Vulnerability

MSRC advisory NVD CVE.org

Assessment

A denial of service vulnerability exists when Microsoft Common Object Runtime Library improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET web application. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the .NET application. The update addresses the vulnerability by correcting how the .NET web application handles web requests.

Severity: Important
CVSS base score: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Impact: Denial of Service
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-405: Asymmetric Resource Consumption (Amplification)
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: HighAC:H
Privileges required: NonePR:N
User interaction: NoneUI:N
Scope: UnchangedS:U
Confidentiality: NoneC:N
Integrity: NoneI:N
Availability: HighA:H

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

Developer Tools, Other

6 affected products

Microsoft Visual Studio 2022 version 17.14
Microsoft Visual Studio 2026 version 18.10
System.Security.Cryptography.Pkcs on .NET 10.0 installed on Windows
System.Security.Cryptography.Pkcs on .NET 11.0 installed on Windows
System.Security.Cryptography.Pkcs on .NET 8.0 installed on Windows
System.Security.Cryptography.Pkcs on .NET 9.0 installed on Windows

What changed

First observed 14 Oct 2026

No field changes in the recorded history.

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