---
id: "CVE-2026-91433"
kind: "vulnerability"
aliases: ["CVE-2026-91433"]
title: "Oracle Siebel Field Service: Smart Answer flaw enables takeover by privileged users"
severity: "high"
cvss: 7.2
epss: 0.00431
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["enterprise-crm", "field-service", "oracle", "siebel", "vendor"]
not_affected_if: ["not-siebel-field-service"]
published_at: "2026-10-20T22:20:46+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-2026-91433", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91433", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Siebel Field Service: Smart Answer flaw enables takeover by privileged users

Oracle Siebel CRM's Field Service product has a flaw in its Smart Answer component that a high-privileged user can reach over HTTP. Successful exploitation can give the attacker full control of the Siebel Apps Field Service application, per NVD's CVSS 7.2 score.

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

## How to check

- Confirm whether Siebel Apps Field Service is deployed and which version runs, against the affected range 17.0-26.9 in the Oracle advisory
- Check whether the Smart Answer component is enabled in your deployment
- unknown for any further check: the sources do not give a file, setting or command

## Fix

- Apply the Oracle Siebel CRM Field Service patch for CVE-2026-91433 (fixed version: unknown in the sources)
- Consult the Oracle Critical Patch Update advisory for the exact patch set

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91433
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91433

## From the sources

Vulnerability in the Siebel Apps - Field Service product of Oracle Siebel CRM (component: Smart Answer).  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 Apps - Field Service.  Successful attacks of this vulnerability can result in takeover of Siebel Apps - Field Service. CVSS 3.1 Base Score 7.2 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

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