CVE-2026-83203

Received Received - Intake

Unauthenticated Access in Siebel CRM End User

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: Oracle

Description

Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Open UI). Supported versions that are affected are 17.0-26.7. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM End User. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Siebel CRM End User accessible data as well as unauthorized update, insert or delete access to some of Siebel CRM End User accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Siebel CRM End User. CVSS 3.1 Base Score 8.6 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L).

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-15

Last Modified

2026-09-15

Generated

2026-10-06

AI Q&A

2026-09-16

EPSS Evaluated

2026-10-04

NVD

CVE-2026-83203

EUVD

EUVD-2026-79555

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	siebel_crm_end_user	From 17.0 (inc) to 26.7 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability affects Oracle Siebel CRM End User versions 17.0 to 26.7. It allows an unauthenticated attacker with network access via HTTP to compromise the system. Successful exploitation can lead to unauthorized access to critical data, modification of some data, and partial denial of service.

Detection Guidance

This vulnerability affects Oracle Siebel CRM End User versions 17.0-26.7 and can be exploited via HTTP. Detection requires checking the installed version of Siebel CRM End User against the affected range. No specific commands are provided in the context, but you should verify the software version and network exposure of the HTTP interface.

Impact Analysis

If you use Oracle Siebel CRM End User versions 17.0 to 26.7, an attacker could gain access to sensitive data, alter or delete some data, or disrupt system availability without needing authentication.

Compliance Impact

This vulnerability could lead to unauthorized access or modification of personal or sensitive data, potentially violating GDPR or HIPAA compliance requirements for data protection and integrity.

Mitigation Strategies

Apply the latest Oracle Siebel CRM patches or updates for versions 17.0-26.7 to address the vulnerability. Ensure network access controls restrict HTTP access to trusted sources only. Monitor for unauthorized access attempts or unusual activity in the Siebel CRM system.

Hi! I’m here to help you understand CVE-2026-83203. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70