Tenable Security Center < 6.9.0 Multiple Vulnerabilities (TNS-2026-22)

critical Nessus Plugin ID 339129

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Synopsis

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

Description

According to its self-reported version, the Tenable Security Center running on the remote host is prior to 6.9.0. It is, therefore, affected by multiple vulnerabilities as referenced in the TNS-2026-22 advisory.

- libcurl might in some circumstances reuse the wrong connection for SMB(S) transfers. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead.
When reusing a connection a range of criteria must be met. Due to a logical error in the code, a network transfer operation that was requested by an application could wrongfully reuse an existing SMB connection to the same server that was using a different 'share' than the new subsequent transfer should. This could in unlucky situations lead to the download of the wrong file or the upload of a file to the wrong place.
When this happens, the same credentials are used and the server name is the same. (CVE-2026-5773)

- libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. An easy handle that first uses default native CA trust can continue trusting the native platform store after the application switches that same handle to custom CA material for a later transfer. (CVE-2026-11564)

- A command injection vulnerability exists in Security Center where a remote, unauthenticated attacker could exploit this issue to execute arbitrary commands on the underlying operating system with the privileges of the service account. (CVE-2026-19682)

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 Security Center 6.9.0 or later.

Plugin Details

Severity: Critical

ID: 339129

File Name: securitycenter_6_9_0_tns_2026_22.nasl

Version: 1.1

Type: Combined

Agent: unix

Family: Misc.

Published: 8/24/2026

Updated: 8/24/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.78

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: High

Base Score: 9

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

CVSS Score Source: CVE-2026-19682

CVSS v3

Risk Factor: Critical

Base Score: 9.9

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

CVSS v4

Risk Factor: Critical

Base Score: 9.4

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

CVSS Score Source: CVE-2026-19682

Vulnerability Information

CPE: cpe:/a:tenable:security_center

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/13/2026

Vulnerability Publication Date: 3/3/2026

Reference Information

CVE: CVE-2026-11564, CVE-2026-11586, CVE-2026-11856, CVE-2026-12064, CVE-2026-19626, CVE-2026-19628, CVE-2026-19629, CVE-2026-19631, CVE-2026-19635, CVE-2026-19636, CVE-2026-19639, CVE-2026-19679, CVE-2026-19680, CVE-2026-19681, CVE-2026-19682, CVE-2026-27601, CVE-2026-3784, CVE-2026-4873, CVE-2026-5545, CVE-2026-5773

Detections

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