# CVE-2026-91423: Oracle Siebel CRM Server Infrastructure privilege escalation

Source: https://junglewise.ai/threats/cve-2026-91423-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-2026-91423 · Severity: medium · CVSS 6 · Published 2026-10-20

Oracle Siebel CRM is a customer relationship management platform that manages critical business data. A vulnerability in the Server Infrastructure component allows a privileged user with local access to the system to gain unauthorized access to sensitive data or modify it. An attacker exploiting this could steal customer information, delete records, or corrupt the CRM database.

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

## Quick answers

**Is CVE-2026-91423 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91423 being exploited in the wild.

**How severe is CVE-2026-91423?** Medium severity, with a CVSS score of 6, published 20 October 2026.

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

**Is there a fix for CVE-2026-91423?** 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-2026-91423 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-91423?** Check whether you run Oracle Siebel CRM 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 privilege escalation vulnerability exists in the Siebel CRM Deployment Server Infrastructure component, exploitable by high-privileged attackers with logon access to the infrastructure. The vulnerability allows unauthorized creation, deletion, or modification of critical data, requiring local access (AV:L) and high privileges (PR:H) with no user interaction needed. No publicly available fix version is documented in the advisory.

## Affected products

- Oracle Siebel CRM 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

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- [Oracle Siebel CRM information disclosure in Management Console](https://junglewise.ai/threats/cve-2026-101448-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
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