--- title: "CVE-2026-83203: Oracle Siebel CRM End User - Broken Access Control" description: "Oracle Siebel CRM End User 17.0-26.7 contains an unauthenticated access vulnerability in Open UI, letting remote attackers compromise data confidentiality, integrity, and availability, exploit requires network access via HTTP." url: https://panop.io/threat-heartbeat/CVE-2026-83203/ --- # CVE-2026-83203 Oracle Siebel CRM End User - Broken Access Control Oracle Siebel CRM End User 17.0-26.7 contains an unauthenticated access vulnerability in Open UI, letting remote attackers compromise data confidentiality, integrity, and availability, exploit requires network access via HTTP. CVSS base score 8.6 /10 High CISA KEV Not listed Public exploit None known Authentication Not required EPSS 0.36% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-83203) ## Details Type Broken Access Control Impact Information Disclosure, Data Tampering, Denial Of Service CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L Published 15 September 2026 Updated 15 October 2026 Weakness [CWE-284](https://cwe.mitre.org/data/definitions/284.html) ## Vendor fix Update to the latest available version beyond 26.7. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-83203](https://nvd.nist.gov/vuln/detail/CVE-2026-83203) - [https://www.oracle.com/security-alerts/cspusep2026.html](https://www.oracle.com/security-alerts/cspusep2026.html) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)