Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure).

published 2026-10-20 19 d ago modified 2026-11-04 5 d ago also EUVD-2026-106687

cvss: 8.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits: 0; none known

Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure). Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows high privileged attacker with network access via HTTP to compromise Siebel CRM Deployment. While the vulnerability is in Siebel CRM Deployment, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Siebel CRM Deployment accessible data as well as unauthorized access to critical data or complete access to all Siebel CRM Deployment accessible data. CVSS 3.1 Base Score 8.7 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N).

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 16 d ago (2026-10-23)

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Affected products

Oracle Corporation Siebel CRM Deployment

Classification

Weakness

CWE-284 Improper Access Control

References

oracle.com /security-alerts/cpuoct2026.html
vendor-advisory

Sources

CVE List CVE-2026-91437
NVD CVE-2026-91437

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Summary