# CVE-2026-101440: Oracle Siebel CRM Cloud Applications authentication bypass in Siebel Cloud Manager

Source: https://junglewise.ai/threats/cve-2026-101440-vulnerability-in-the-siebel-crm-cloud-applications-product-of  
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-2026-101440 · Severity: medium · CVSS 5.9 · Published 2026-10-20

Oracle Siebel CRM is a cloud-based customer relationship management system that stores and manages critical business data. An unauthenticated attacker with physical access to the network segment where the system runs can bypass security controls and read sensitive customer data or modify records. This could expose confidential customer information or allow unauthorized changes to business-critical data.

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

## Quick answers

**Is CVE-2026-101440 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-101440 being exploited in the wild.

**How severe is CVE-2026-101440?** Medium severity, with a CVSS score of 5.9, published 20 October 2026.

**Which products and versions are affected?** Oracle Siebel CRM Cloud Applications 22.3 through 26.9.

**Is there a fix for CVE-2026-101440?** 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-2026-101440 attacked?** It is attacked from the adjacent network, in a hosted service.

**Am I affected by CVE-2026-101440?** Check whether you run Oracle Siebel CRM Cloud Applications 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 authentication bypass vulnerability in Siebel Cloud Manager component allows unauthenticated attackers with adjacent network access to compromise the system and gain unauthorized access to sensitive data or make unauthorized modifications. The vulnerability is difficult to exploit and requires physical access to the communication segment, but succeeds without user interaction or elevated privileges. A fix is available in patched versions.

## Affected products

- Oracle Siebel CRM Cloud Applications 22.3 through 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 information disclosure in Cloud Manager](https://junglewise.ai/threats/cve-2026-91371-vulnerability-in-the-siebel-crm-cloud-applications-product-of)
- [Oracle Siebel CRM information disclosure in Cloud Manager](https://junglewise.ai/threats/cve-2026-91370-vulnerability-in-the-siebel-crm-cloud-applications-product-of)
- [Oracle Siebel CRM data integrity tampering in Cloud Manager](https://junglewise.ai/threats/cve-2026-91369-vulnerability-in-the-siebel-crm-cloud-applications-product-of)
- [Oracle Siebel CRM unauthorized data access in Cloud Manager](https://junglewise.ai/threats/cve-2026-91368-vulnerability-in-the-siebel-crm-cloud-applications-product-of)
- [Oracle Siebel CRM Cloud Applications privilege escalation in Cloud Manager](https://junglewise.ai/threats/cve-2026-91367-vulnerability-in-the-siebel-crm-cloud-applications-product-of)