Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.

Security Update for Microsoft .NET Framework (October 2026)

PT OCT 2026 - .NET Core, SDK, and ASP.NET Core

The Microsoft .NET Framework installation on the remote host is missing a security update. It is, therefore, affected by multiple vulnerabilities, including the following:

  - Out-of-bounds write in .NET Framework allows an unauthorized attacker to execute code over a network.
    (CVE-2026-70007)

  - Deserialization of untrusted data in .NET Framework allows an unauthorized attacker to execute code over a     network. (CVE-2026-70035)

  - Improperly implemented security check for standard in .NET allows an unauthorized attacker to execute code     over a network. (CVE-2026-70174)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Microsoft Visual Studio Products are missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over     a network. (CVE-2026-105016)

  - Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core     allows an unauthorized attacker to perform tampering over a network. (CVE-2026-88092)

  - Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core     allows an unauthorized attacker to bypass a security feature over a network. (CVE-2026-70188)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Windows host is missing security update 5126868. It is, therefore, affected by multiple vulnerabilities

  - Use after free in Windows Message Queuing Queue Manager allows an unauthorized attacker to execute code     over a network. (CVE-2026-100202)

  - Heap-based buffer overflow in Network Policy Server (NPS) allows an unauthorized attacker to execute code     over a network. (CVE-2026-100222)

  - Use after free in Microsoft Windows Search Component allows an unauthorized attacker to elevate privileges     over a network. (CVE-2026-105010)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
366093	Microsoft .NET Framework (October 2026)	Nessus	Windows : Microsoft Bulletins	Local	high
366085	Security Updates for Microsoft Visual Studio Products 17.14.42 and 18.10.4 (October 2026)	Nessus	Windows : Microsoft Bulletins	Local	critical
365471	KB5126868: Windows 10 Version 1607 / Windows Server 2016 Security Update (October 2026)	Nessus	Windows : Microsoft Bulletins	Local	critical

Detections

Analytics

CVE-2026-83520

high

Tenable Plugins

Coming Soon

high

critical

critical