Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.

The version of Tenable Identity Exposure running on the remote host is prior to 3.93.5. It is, therefore, affected by multiple vulnerabilities according to advisory TNS-2026-16:

  - Tenable Identity Exposure contains multiple unauthenticated API endpoints under /w/api/* that expose     sensitive application configuration data including cleartext LDAP credentials, SAML configuration, user     accounts, and directory settings to unauthenticated remote attackers. Affected responses are served with     Cache-Control: public headers and without Vary: Cookie, allowing reverse proxies and CDNs to cache and     serve sensitive data to unauthenticated users even after authentication is applied. (CVE-2026-13007)

  - Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows     an authorized attacker to bypass a security feature over a network. (CVE-2025-55315)

  - Converting an excessively large OCTET STRING value to a hexadecimal string leads to a heap buffer     overflow on 32 bit platforms. A heap buffer overflow may lead to a crash or possibly an attacker     controlled code execution or other undefined behavior. (CVE-2026-31789)

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

An update of the dotnet package has been released.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1804 advisory.

    Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-32177)

    Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to     deny service over a network. (CVE-2026-42899)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1802 advisory.

    Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-32177)

    Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to     deny service over a network. (CVE-2026-42899)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1803 advisory.

    Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-32177)

    Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to     deny service over a network. (CVE-2026-42899)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-b1a2f623e7 advisory.

    Update to .NET SDK 8.0.127 and Runtime 8.0.27

    Fixes: CVE-2026-32175,CVE-2026-32177,CVE-2026-35433,CVE-2026-42899

    Release Notes:

    - SDK: https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.27/8.0.127.md
    - Runtime: https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.27/8.0.27.md

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-8923ef586f advisory.

    Update to .NET SDK 10.0.108 and Runtime 10.0.8

    Fixes: CVE-2026-32175,CVE-2026-32177,CVE-2026-35433,CVE-2026-42899

    Release Notes:

    - SDK: https://github.com/dotnet/core/blob/main/release-notes/10.0/10.0.8/10.0.108.md
    - Runtime: https://github.com/dotnet/core/blob/main/release-notes/10.0/10.0.8/10.0.8.md

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-ef4291bd79 advisory.

    Update to .NET SDK 10.0.108 and Runtime 10.0.8

    Fixes: CVE-2026-32175,CVE-2026-32177,CVE-2026-35433,CVE-2026-42899

    Release Notes:

    - SDK: https://github.com/dotnet/core/blob/main/release-notes/10.0/10.0.8/10.0.108.md
    - Runtime: https://github.com/dotnet/core/blob/main/release-notes/10.0/10.0.8/10.0.8.md

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-3e509b1444 advisory.

    Update to .NET SDK 8.0.127 and Runtime 8.0.27

    Fixes: CVE-2026-32175,CVE-2026-32177,CVE-2026-35433,CVE-2026-42899

    Release Notes:

    - SDK: https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.27/8.0.127.md
    - Runtime: https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.27/8.0.27.md

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-0d598afbf9 advisory.

    Update to .NET SDK 10.0.108 and Runtime 10.0.8

    Fixes: CVE-2026-32175,CVE-2026-32177,CVE-2026-35433,CVE-2026-42899

    Release Notes:

    - SDK: https://github.com/dotnet/core/blob/main/release-notes/10.0/10.0.8/10.0.108.md
    - Runtime: https://github.com/dotnet/core/blob/main/release-notes/10.0/10.0.8/10.0.8.md

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-223f4839fc advisory.

    Update to .NET SDK 8.0.127 and Runtime 8.0.27

    Fixes: CVE-2026-32175,CVE-2026-32177,CVE-2026-35433,CVE-2026-42899

    Release Notes:

    - SDK: https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.27/8.0.127.md
    - Runtime: https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.27/8.0.27.md

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-85758358ff advisory.

    Update to .NET SDK 9.0.117 and Runtime 9.0.16

    Fixes: CVE-2026-32175,CVE-2026-32177,CVE-2026-35433,CVE-2026-42899

    Release Notes:

    - SDK: https://github.com/dotnet/core/blob/main/release-notes/9.0/9.0.16/9.0.117.md
    - Runtime: https://github.com/dotnet/core/blob/main/release-notes/9.0/9.0.16/9.0.16.md

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-6013769170 advisory.

    Update to .NET SDK 9.0.117 and Runtime 9.0.16

    Fixes: CVE-2026-32175,CVE-2026-32177,CVE-2026-35433,CVE-2026-42899

    Release Notes:

    - SDK: https://github.com/dotnet/core/blob/main/release-notes/9.0/9.0.16/9.0.117.md
    - Runtime: https://github.com/dotnet/core/blob/main/release-notes/9.0/9.0.16/9.0.16.md

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-9c63a012b9 advisory.

    Update to .NET SDK 9.0.117 and Runtime 9.0.16

    Fixes: CVE-2026-32175,CVE-2026-32177,CVE-2026-35433,CVE-2026-42899

    Release Notes:

    - SDK: https://github.com/dotnet/core/blob/main/release-notes/9.0/9.0.16/9.0.117.md
    - Runtime: https://github.com/dotnet/core/blob/main/release-notes/9.0/9.0.16/9.0.16.md

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-32177)

Note that Nessus relies on the presence of the package as reported by the vendor.

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

  - Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-32177)

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

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the vendor advisory.

  - A tampering vulnerability exists when .NET Core improperly handles specially crafted files. An attacker     who successfully exploited this vulnerability could write arbitrary files and directories to certain     locations on a vulnerable system. However, an attacker would have limited control over the destination of     the files and directories. To exploit the vulnerability, an attacker must send a specially crafted file to     a vulnerable system. The security update fixes the vulnerability by ensuring .NET Core properly handles     files. (CVE-2026-32175)

  - Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-32177)

  - Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-35433)

  - Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to     deny service over a network. (CVE-2026-42899)

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 .NET allows an unauthorized attacker to elevate privileges locally.   (CVE-2026-32177)

  - A tampering vulnerability exists when .NET Core improperly handles specially crafted files. An attacker   who successfully exploited this vulnerability could write arbitrary files and directories to certain   locations on a vulnerable system. However, an attacker would have limited control over the destination of   the files and directories. To exploit the vulnerability, an attacker must send a specially crafted file to   a vulnerable system. The security update fixes the vulnerability by ensuring .NET Core properly handles   files. (CVE-2026-32175)

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	Severity
322483	Tenable Identity Exposure < 3.93.5 Multiple Vulnerabilities (TNS-2026-16)	Nessus	Misc.	high
321548	Photon OS 4.0: Dotnet PHSA-2026-4.0-1036	Nessus	PhotonOS Local Security Checks	medium
319877	Amazon Linux 2023 : aspnetcore-runtime-8.0, aspnetcore-runtime-dbg-8.0, aspnetcore-targeting-pack-8.0 (ALAS2023-2026-1804)	Nessus	Amazon Linux Local Security Checks	high
319800	Amazon Linux 2023 : aspnetcore-runtime-9.0, aspnetcore-runtime-dbg-9.0, aspnetcore-targeting-pack-9.0 (ALAS2023-2026-1802)	Nessus	Amazon Linux Local Security Checks	high
319786	Amazon Linux 2023 : aspnetcore-runtime-10.0, aspnetcore-runtime-dbg-10.0, aspnetcore-targeting-pack-10.0 (ALAS2023-2026-1803)	Nessus	Amazon Linux Local Security Checks	high
316650	Fedora 42 : dotnet8.0 (2026-b1a2f623e7)	Nessus	Fedora Local Security Checks	high
316649	Fedora 43 : dotnet10.0 (2026-8923ef586f)	Nessus	Fedora Local Security Checks	high
316648	Fedora 42 : dotnet10.0 (2026-ef4291bd79)	Nessus	Fedora Local Security Checks	high
316633	Fedora 43 : dotnet8.0 (2026-3e509b1444)	Nessus	Fedora Local Security Checks	high
316632	Fedora 44 : dotnet10.0 (2026-0d598afbf9)	Nessus	Fedora Local Security Checks	high
316630	Fedora 44 : dotnet8.0 (2026-223f4839fc)	Nessus	Fedora Local Security Checks	high
316619	Fedora 42 : dotnet9.0 (2026-85758358ff)	Nessus	Fedora Local Security Checks	high
316609	Fedora 43 : dotnet9.0 (2026-6013769170)	Nessus	Fedora Local Security Checks	high
316608	Fedora 44 : dotnet9.0 (2026-9c63a012b9)	Nessus	Fedora Local Security Checks	high
316599	Linux Distros Unpatched Vulnerability : CVE-2026-32177	Nessus	Misc.	high
314930	Security Updates for Microsoft .NET Framework (May 2026)	Nessus	Windows : Microsoft Bulletins	high
314680	Security Update for Microsoft .NET Core SDK (May 2026)	Nessus	Windows	high
314679	Security Update for Microsoft .NET Core (May 2026)	Nessus	Windows	high
314647	Security Updates for Microsoft Visual Studio Products (May 2026)	Nessus	Windows : Microsoft Bulletins	high

Detections

Analytics

CVE-2026-32177

high

Tenable Plugins

high

medium

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high