Vulnerability Details CVE-2026-91421
Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure). Supported versions that are affected are 17.0-26.9. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Deployment. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Siebel CRM Deployment. CVSS 3.1 Base Score 5.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 31.7%
CVSS Severity
CVSS v3 Score 5.9
Products affected by CVE-2026-91421
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cpe:2.3:a:oracle:siebel_crm:17.0
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cpe:2.3:a:oracle:siebel_crm:18.12
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cpe:2.3:a:oracle:siebel_crm:19.1
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cpe:2.3:a:oracle:siebel_crm:19.2
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cpe:2.3:a:oracle:siebel_crm:19.3
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cpe:2.3:a:oracle:siebel_crm:19.4
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cpe:2.3:a:oracle:siebel_crm:19.8
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cpe:2.3:a:oracle:siebel_crm:21.5
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cpe:2.3:a:oracle:siebel_crm:22.3
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cpe:2.3:a:oracle:siebel_crm:23.3
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cpe:2.3:a:oracle:siebel_crm:24.4
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cpe:2.3:a:oracle:siebel_crm:25.0
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cpe:2.3:a:oracle:siebel_crm:25.12
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cpe:2.3:a:oracle:siebel_crm:25.5
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cpe:2.3:a:oracle:siebel_crm:26.3
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cpe:2.3:a:oracle:siebel_crm:26.4
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cpe:2.3:a:oracle:siebel_crm:26.5
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cpe:2.3:a:oracle:siebel_crm:26.6