Tenable Nessus Agent < 8.3.1 Multiple Vulnerabilities (TNS-2021-15)

medium Nessus Plugin ID 153159


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


According to its self-reported version, the Tenable Nessus agent running on the remote host is prior to 8.3.1. It is, therefore, affected by multiple privilege escalation vulnerabilities which could allow an allow an authenticated, local administrator to run specific executables on the Nessus Agent host.

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


Upgrade to Tenable Nessus Agent version 8.3.1 or later.

See Also


Plugin Details

Severity: Medium

ID: 153159

File Name: tenable_nessus_agent_tns_2021_15.nasl

Version: 1.5

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 9/9/2021

Updated: 4/11/2022

Configuration: Enable thorough checks

Supported Sensors: Frictionless Assessment Agent, Nessus Agent

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2021-20118


Risk Factor: Medium

Base Score: 6.7

Temporal Score: 5.8

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

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

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: 9/7/2021

Vulnerability Publication Date: 9/7/2021

Reference Information

CVE: CVE-2021-20117, CVE-2021-20118

IAVA: 2021-A-0409