# CVE-2026-91440: Oracle Siebel CRM Deployment unauthorized data access in Server Infrastructure

Source: https://junglewise.ai/threats/cve-2026-91440-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-2026-91440 · Severity: medium · CVSS 6.5 · Published 2026-10-20

Oracle Siebel CRM Deployment is a customer relationship management system that stores and manages business-critical customer data. An unauthenticated attacker with network access can exploit an easily exploitable vulnerability to read sensitive customer data and modify or delete records without authorization. This poses a direct risk to data confidentiality and integrity for organizations relying on Siebel for customer information management.

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-2026-91440 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91440 being exploited in the wild.

**How severe is CVE-2026-91440?** Medium severity, with a CVSS score of 6.5, published 20 October 2026.

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

**Is there a fix for CVE-2026-91440?** 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-2026-91440 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-91440?** 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

An easily exploitable vulnerability in the Server Infrastructure component of Siebel CRM Deployment allows unauthenticated network attackers to access data via HTTP without authentication or user interaction required. Successful exploitation results in unauthorized read access to a subset of accessible data and unauthorized update, insert, or delete operations on some Siebel CRM Deployment data. The vulnerability affects versions 17.0 through 26.9.

## 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)