# CVE-2026-83403: Oracle Identity Manager arbitrary code execution in OIM Legacy UI

Source: https://junglewise.ai/threats/cve-2026-83403-vulnerability-in-the-oracle-identity-manager-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-2026-83403 · Severity: high · CVSS 8.8 · Published 2026-10-20

Oracle Identity Manager is a user and access provisioning system used to manage corporate identities and permissions. A vulnerability in its Legacy UI component allows a low-privileged attacker to take full control of the system, potentially compromising user identities and access controls across the organization. The flaw requires only network access and valid credentials to exploit.

Technologies: [Oracle Identity Manager](https://junglewise.ai/threats/technologies/oracle-identity-manager). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-83403 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83403 being exploited in the wild.

**How severe is CVE-2026-83403?** High severity, with a CVSS score of 8.8, published 20 October 2026.

**Which products and versions are affected?** Oracle Identity Manager 12.2.1.4.0, 14.1.2.1.0.

**Is there a fix for CVE-2026-83403?** 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-2026-83403 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-83403?** Check whether you run Oracle Identity Manager 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 OIM Legacy UI component allows a low-privileged attacker with network access via HTTP to achieve full system compromise. The vulnerability is triggered through HTTP requests and requires valid user credentials but no further user interaction. Successful exploitation results in complete takeover of Oracle Identity Manager, affecting confidentiality, integrity, and availability.

## Affected products

- Oracle Identity Manager 12.2.1.4.0, 14.1.2.1.0

## 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 Identity Manager privilege escalation in Installer](https://junglewise.ai/threats/cve-2026-91501-vulnerability-in-the-oracle-identity-manager-product-of-oracle)
- [Oracle Identity Manager unauthenticated remote code execution](https://junglewise.ai/threats/cve-2026-91408-vulnerability-in-the-oracle-identity-manager-product-of-oracle)
- [Oracle Identity Manager remote code execution in REST WebServices](https://junglewise.ai/threats/cve-2026-91407-vulnerability-in-the-oracle-identity-manager-product-of-oracle)
- [Oracle Identity Manager privilege escalation in Legacy UI](https://junglewise.ai/threats/cve-2026-91259-vulnerability-in-the-oracle-identity-manager-product-of-oracle)
- [Oracle Identity Manager privilege escalation in OIM Legacy UI](https://junglewise.ai/threats/cve-2026-83402-vulnerability-in-the-oracle-identity-manager-product-of-oracle)