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

high 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.

See Also

https://docs.tenable.com/release-notes/Content/nessus/nessus.htm

https://www.tenable.com/security/TNS-2026-04

Plugin Details

Severity: High

ID: 298226

File Name: nessus_TNS-2026-04.nasl

Version: 1.3

Type: combined

Agent: windows, macosx, unix

Family: Misc.

Published: 2/6/2026

Updated: 3/12/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

CVSS Score Rationale: Tenable vendor advisory score.

VPR

Risk Factor: Medium

Score: 6.7

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.6

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

CVSS Score Source: manual

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

CVSS Score Source: manual

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