Tenable Nessus < 10.10.2 / 10.11.0 < 10.11.2 Multiple Vulnerabilities (TNS-2026-04)

low Nessus Plugin ID 298226

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Synopsis

An instance of Nessus installed on the remote system is affected by multiple vulnerabilities.

Description

According to its self-reported version, the Tenable Nessus application running on the remote host prior to 10.10.2, 10.11.0 prior to 10.11.2. It is, therefore, affected by multiple vulnerabilities as referenced in the TNS-2026-04 advisory.

- In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data.
(CVE-2026-24515)

- In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation. (CVE-2026-25210)

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

Solution

Upgrade to Tenable Nessus 10.10.2, 10.11.2 or later.

Plugin Details

Severity: Low

ID: 298226

File Name: nessus_TNS-2026-04.nasl

Version: 1.2

Type: combined

Agent: windows, macosx, unix

Family: Misc.

Published: 2/6/2026

Updated: 2/9/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 4.4

Vector: CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:P

CVSS Score Source: CVE-2026-25210

CVSS v3

Risk Factor: Low

Base Score: 2.5

Temporal Score: 2.2

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-24515

Vulnerability Information

CPE: cpe:/a:tenable:nessus

Required KB Items: installed_sw/Tenable Nessus

Exploit Ease: No known exploits are available

Patch Publication Date: 2/5/2026

Vulnerability Publication Date: 1/23/2026

Reference Information

CVE: CVE-2026-24515, CVE-2026-25210

Detections

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