---
id: "CVE-2026-91444"
kind: "vulnerability"
aliases: ["CVE-2026-91444"]
title: "Oracle Siebel CRM Deployment: local high-privilege flaw allows full takeover"
severity: "medium"
cvss: 6.7
epss: 0.00117
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["on-prem", "oracle", "other", "self-hosted", "siebel-crm"]
not_affected_if: ["not-running-siebel", "patched-version"]
published_at: "2026-10-20T22:20:48+00:00"
first_seen_at: "2026-10-23T21:57:26+00:00"
updated_at: "2026-10-25T12:38:52+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91444", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91444", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Siebel CRM Deployment: local high-privilege flaw allows full takeover

Oracle Siebel CRM Deployment has a flaw in its Server Infrastructure component, affecting supported versions 17.0 through 26.9. An attacker who already has high-privilege logon to the host running Siebel CRM Deployment can take over the product.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Confirm the installed Siebel CRM Deployment version, affected range is `17.0` through `26.9`
- Check Oracle's Critical Patch Update advisory for the patched release unknown

## Fix

- Apply the Oracle Siebel CRM patch for the Server Infrastructure component (patched version unknown from the sources)
- Restrict high-privilege logon to Siebel hosts until patched

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91444
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91444

## From the sources

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 logon to the infrastructure where Siebel CRM Deployment executes to compromise Siebel CRM Deployment.  Successful attacks of this vulnerability can result in takeover of Siebel CRM Deployment. CVSS 3.1 Base Score 6.7 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_