The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8176-1 advisory.

    Ludvig Pedersen discovered that the System.Security.Cryptography.Xml library in .NET incorrectly handled     certain XML inputs. An attacker could possibly use this issue to consume excessive resources, resulting in     a denial of service. (CVE-2026-33116, CVE-2026-26171)

    Ludvig Pedersen and Kevin Jones discovered that the System.Security.Cryptography.Xml library in .NET     incorrectly handled certain XML inputs. An attacker could possibly use this issue to cause .NET to crash,     resulting in a denial of service. (CVE-2026-32203)

    Ludvig Pedersen discovered that the System.Net.Mail component in .NET incorrectly handled certain inputs.
    An attacker could possibly use this issue to perform a network spoofing attack. (CVE-2026-32178)

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

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

Detections

Analytics

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 : .NET vulnerabilities (USN-8176-1)

high Nessus Plugin ID 306722

Version 1.3

Version 1.2

Version 1.1

Version 1.3 May 8, 2026, 7:45 AM CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H") CVSSv3 score source (set to "CVE-2026-33116") Plugin Feed: 202605080745
Version 1.2 Apr 20, 2026, 10:26 PM Plugin metadata (Add IAVM Info) Plugin Feed: 202604202226
Version 1.1 Apr 16, 2026, 7:20 PM New Plugin Feed: 202604161920