# CVE-2026-91426: Oracle Siebel CRM Deployment unauthorized data access in Server Infrastructure

Source: https://junglewise.ai/threats/cve-2026-91426-vulnerability-in-the-siebel-crm-deployment-product-of-oracle  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-20. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-91426 · Severity: medium · CVSS 5.5 · Published 2026-10-20

Oracle Siebel CRM Deployment is enterprise customer relationship management software that manages critical business data. A low-privileged attacker with local access to the server can read sensitive customer and business data without proper authorization. This could expose confidential company records and customer information stored within the CRM system.

Technologies: [Oracle Siebel CRM Deployment](https://junglewise.ai/threats/technologies/siebel-crm-deployment). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-91426 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91426 being exploited in the wild.

**How severe is CVE-2026-91426?** Medium severity, with a CVSS score of 5.5, published 20 October 2026.

**Which products and versions are affected?** Oracle Siebel CRM Deployment 17.0-26.9.

**Is there a fix for CVE-2026-91426?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-91426 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-91426?** Check whether you run Oracle Siebel CRM Deployment at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A local information disclosure vulnerability in the Server Infrastructure component of Oracle Siebel CRM Deployment allows a low-privileged authenticated attacker to access confidential data. The vulnerability requires local access to the infrastructure where the application executes and authenticated credentials, but no user interaction. Successful exploitation grants read access to sensitive CRM data without authorization.

## Affected products

- Oracle Siebel CRM Deployment 17.0-26.9

## Timeline

- 2026-10-20: disclosed

## References

- [https://www.oracle.com/security-alerts/cpuoct2026.html](https://www.oracle.com/security-alerts/cpuoct2026.html)

## Related threats

- [Oracle Siebel CRM unauthorized data access in Server Infrastructure](https://junglewise.ai/threats/cve-2026-91450-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM Deployment unauthorized data access via HTTP](https://junglewise.ai/threats/cve-2026-91449-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM Deployment unauthenticated data access](https://junglewise.ai/threats/cve-2026-91448-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM Deployment unauthorized data access](https://junglewise.ai/threats/cve-2026-91447-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM privilege escalation in Server Infrastructure](https://junglewise.ai/threats/cve-2026-91444-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)