CVE-2026-70162: .NET Denial of Service Vulnerability

Overview

Severity

Medium (CVSS 5.9)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

Category

Denial of Service

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Oct

Released

2026-10-13

Description

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.

Affected Products (6)

Other

• 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

Developer Tools

• Microsoft Visual Studio 2026 version 18.10
• Microsoft Visual Studio 2022 version 17.14

Security Updates (1)

• Release Notes

Acknowledgments

<a href="https://x.com/soaj1664ashar">Dr.-Ing Ashar Javed</a>

Revision History

• 2026-10-13: Information published.