CVE-2026-70857

Analyzed Analyzed - Analysis Complete

Cross-Site Scripting in Oracle Siebel CRM End User

Publication date: 2026-08-18

Last updated on: 2026-08-21

Assigner: Oracle

Description

Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Open UI). Supported versions that are affected are 17.0-26.6. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTPS to compromise Siebel CRM End User. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Siebel CRM End User, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Siebel CRM End User accessible data as well as unauthorized access to critical data or complete access to all Siebel CRM End User accessible data. CVSS 3.1 Base Score 7.7 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N).

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-18

Last Modified

2026-08-21

Generated

2026-09-08

AI Q&A

2026-08-19

EPSS Evaluated

2026-09-06

NVD

CVE-2026-70857

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	siebel_crm	From 17.0 (inc) to 26.6 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This vulnerability affects Oracle Siebel CRM End User versions 17.0 to 26.6. It allows a low-privileged attacker with network access via HTTPS to exploit a flaw in the Open UI component. The attack requires human interaction from someone other than the attacker and can impact additional products beyond the primary target.

Detection Guidance

Detection of CVE-2026-70857 requires monitoring for unauthorized access or modifications to Siebel CRM End User data. Check Oracle Siebel logs for unusual HTTPS traffic patterns or privilege escalation attempts. Inspect network traffic for suspicious interactions with the Open UI component. Ensure all Oracle Siebel patches are applied to versions 17.0-26.6.

Impact Analysis

If exploited, this vulnerability could allow unauthorized creation, deletion, or modification of critical data within Siebel CRM End User. It may also grant unauthorized access to sensitive data or full access to all accessible data in the system.

Compliance Impact

This vulnerability allows unauthorized access, modification, or deletion of critical data, which could lead to violations of data protection regulations like GDPR and HIPAA. Unauthorized access to sensitive data may result in non-compliance with confidentiality and integrity requirements under these standards.

Mitigation Strategies

Apply the latest Oracle Siebel CRM patches or updates for versions 17.0-26.6. Restrict network access to the Siebel CRM End User component via HTTPS. Monitor for unusual data modification or access patterns in the Siebel CRM system.

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