Oracle Siebel Server <= 25.2 (January 2026 CPU)

high Nessus Plugin ID 294866

Synopsis

The remote host is affected by multiple vulnerabilities

Description

The versions of Oracle Siebel CRM installed on the remote host are affected by a vulnerability as referenced in the January 2026 CPU advisory.

- Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure). Supported versions that are affected are 17.0-25.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via TLS to compromise Siebel CRM Deployment.
Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Siebel CRM Deployment. (CVE-2026-21926)

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

Solution

Apply the appropriate patch according to the January 2026 Oracle Critical Patch Update advisory.

Plugin Details

Severity: High

ID: 294866

File Name: oracle_siebel_cpu_jan_2026_25_2.nasl

Version: 1.1

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 1/21/2026

Updated: 1/21/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-21926

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/a:oracle:siebel_crm

Required KB Items: installed_sw/Oracle Siebel Server

Exploit Ease: No known exploits are available

Patch Publication Date: 1/20/2026

Vulnerability Publication Date: 1/20/2026

Reference Information

CVE: CVE-2026-21926

Detections

Analytics