CVE-2026-70859: Oracle Siebel CRM

High severity, CVSS 8.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM (component: REST). Supported versions that are affected are 17.0-26.6. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM Integration. While the vulnerability is in Siebel CRM Integration, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Siebel CRM Integration. CVSS 3.1 Base Score 8.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H).

Affected products

• Oracle Siebel CRM: from 17.0, up to and including 26.6

Published 2026-08-18. Last modified 2026-08-21.