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Tenable Nessus Agent < 10.9.3 / 11.x < 11.0.3 Privilege Escalation Vulnerability (TNS-2026-01)

high Nessus Plugin ID 282477

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Synopsis

An instance of Nessus Agent installed on the remote system is affected by Privilege Escalation Vulnerability.

Description

According to its self-reported version, the Tenable Nessus Agent running on the remote host is prior to 10.9.3 or 11.0.3. It is, therefore, affected by a Privilege Escalation Vulnerability as referenced in the TNS-2026-01 advisory.

 - A vulnerability has been identified in the installation/uninstallation of the Nessus Agent Tray App on Windows Hosts which could lead to escalation of privileges. (CVE-2025-36640)

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 Agent 10.9.3 / 11.0.3 or later.

See Also

http://www.nessus.org/u?3bdd8712

https://www.tenable.com/security/TNS-2026-01

Plugin Details

Severity: High

ID: 282477

File Name: tenable_nessus_agent_TNS-2026-01.nasl

Version: 1.3

Type: local

Agent: windows, macosx, unix

Family: Windows

Published: 1/8/2026

Updated: 2/17/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2025-36640

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

CVSS v4

Risk Factor: High

Base Score: 8.8

Threat Score: 7.3

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Vulnerability Information

CPE: cpe:/a:tenable:nessus_agent

Required KB Items: installed_sw/Tenable Nessus Agent

Exploit Ease: No known exploits are available

Patch Publication Date: 1/7/2026

Vulnerability Publication Date: 11/9/2025

Reference Information

CVE: CVE-2025-36640

IAVA: 2026-A-0149