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Oracle Siebel CRM EUVDEUVD-2026-106698

| CVE-2026-91448 HIGH
Information Exposure (CWE-200)
2026-10-20 secalert_us@oracle.com GHSA-p4rf-pmpq-x72r
7.5
CVSS 3.1 · Vendor: oracle
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach Siebel HTTP endpoint over network
  2. Exploit
    Send crafted HTTP request to Server Infrastructure
  3. Impact
    Exfiltrate critical Siebel CRM data

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V14 - Data Protection Data exposure prevention
MITRE ATT&CK

2 techniques across 2 tactics: Collection, Discovery

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

No special conditions beyond network reachability - remote unauthenticated exploitation over HTTP against the Server Infrastructure component of Oracle Siebel CRM Deployment, affecting supported versions 17.0 through 26.9 (per CVSS PR:N/UI:N/AC:L). The description names no required feature toggle or non-default configuration. Limiting factors: the attacker must have network HTTP access to the Siebel CRM Deployment (mitigated where the server is not internet-exposed or is segmented behind network controls), and impact is confined to unauthorized reading of data - there is no integrity or availability impact, so the flaw cannot by itself be used to alter records or cause outages.

Impact

The CVSS 3.1 base score is 7.5 (High) driven by a clean network-exploitable profile: AV:N/AC:L/PR:N/UI:N means an unauthenticated remote attacker can reach the flaw over HTTP with low complexity and no user interaction. However, impact is confidentiality-only (C:H/I:N/A:N) - the attacker can read critical Siebel CRM data but cannot modify data or disrupt availability, so this is an information-disclosure issue, not full compromise. No EPSS score, no CISA KEV listing, and no public POC were provided in the input, so there is no public exploit identified at time of analysis and no evidence of active exploitation; the real-world urgency therefore rests on the easy, unauthenticated attack profile rather than on observed exploitation. One signal conflicts: the input Tags include 'Authentication Bypass', but the CVSS vector and description describe unauthenticated read access to data (confidentiality impact only), not a privilege/authentication-state bypass - treat the 'Authentication Bypass' characterization with caution and verify against the Oracle advisory. Overall this is a genuine patch priority for Siebel operators given PR:N/AC:L network reach, but it is bounded by being confidentiality-only with no confirmed exploitation.

Exploit ScenarioDerived

An unauthenticated attacker with network access to an internet-facing or internally-reachable Siebel CRM Deployment sends crafted HTTP requests to the Server Infrastructure component and retrieves critical business data accessible to that deployment. No credentials, user interaction, or special privileges are required, and attack complexity is low. No public exploit code was identified in the provided data.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Unauthenticated remote attackers can read critical data from Oracle Siebel CRM Deployment (Server Infrastructure component) in supported versions 17.0 through 26.9 via HTTP, with low attack complexity and no user interaction, yielding a CVSS 3.1 score of 7.5 (High) and confidentiality-only impact. No public exploit identified at time of analysis, and no CISA KEV active exploitation is reported. Remediate by applying Oracle's October 2026 Critical Patch Update referenced in the vendor advisory.

RemediationAI

Patch available per vendor advisory: apply the Oracle Critical Patch Update for October 2026 to Oracle Siebel CRM Deployment versions 17.0 through 26.9, following https://www.oracle.com/security-alerts/cpuoct2026.html; the input does not provide an exact patched build number, so confirm the fixed release in the advisory. Until patching is complete, reduce exposure by restricting HTTP access to the Siebel CRM Deployment Server Infrastructure to trusted networks, VPN, or an allowlisted reverse proxy or WAF, accepting that this may inconvenience legitimate remote users, and review web and access logs for unauthenticated requests to data-bearing endpoints, noting that no public exploit identified at time of analysis. No vendor-published workaround was provided in the available data.

Affected VersionsENISA

Siebel CRM Deployment 17.0 ≤26.9

Affected Packages

euvd siebel_crm_deployment no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The issue affects the Server Infrastructure component of Oracle Siebel CRM Deployment, an enterprise CRM platform whose HTTP services are reachable by network clients. No CWE is assigned in the available data, but the supplied tags identify an Authentication Bypass pattern, and the CVSS vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N confirms an unauthenticated, low-complexity network path with no user interaction and only confidentiality impact. In practical terms, an improperly enforced access control or information-exposure condition on a Siebel HTTP endpoint lets a remote user obtain data that should require authorization; because integrity and availability are unaffected (I:N/A:N), the flaw is best characterized as a data-disclosure weakness rather than a path to record tampering or denial of service. No CPE strings were provided, so exact platform and OS bindings cannot be enumerated from the input; affected supported versions are 17.0 through 26.9.

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Severity by source

Vendor (oracle) PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 7.5 HIGH

Unauthenticated HTTP-reachable data disclosure gives AV:N/AC:L/PR:N/UI:N; impact is confidentiality-only, so C:H with I:N and A:N, and no scope change.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionCVE.org

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 unauthenticated attacker with network access via HTTP to compromise Siebel CRM Deployment. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Siebel CRM Deployment accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Executive ViewAI

Why It Matters

Oracle Siebel CRM Deployment Server Infrastructure versions 17.0 through 26.9 has a high-severity confidentiality flaw that could allow remote attackers to read critical CRM data, creating regulatory, contractual, and reputational risk if customer or business-critical records are exposed. No public exploit has been identified at time of analysis, but no vendor patch is currently available, so leadership should prioritize exposure reduction and prepare for Oracle's October 2026 Critical Patch Update.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis; interim mitigations include restricting HTTP access to Siebel Deployment Server Infrastructure 17.0 through 26.9, segmenting the component from untrusted networks, enabling WAF/HTTP inspection, enforcing least privilege, monitoring for abnormal data reads, and applying Oracle's October 2026 Critical Patch Update when available.

Threat Intelligence Overview

EPSS Score
0.4%
Top 67% exploitable
Prevalence
Medium
enterprise CRM deployed by many large organizations but not everywhere
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.4%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
High

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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