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EnterpriseOne Tools EUVDEUVD-2026-106561

| CVE-2026-91307 HIGH
Information Exposure (CWE-200)
2026-10-20 secalert_us@oracle.com GHSA-855q-7m52-wcq6
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 Oracle Net service over network
  2. Delivery
    Send crafted request to Installation Security component
  3. Exploit
    Bypass access controls unauthenticated
  4. Execution
    Read critical EnterpriseOne data
  5. Impact
    Exfiltrate sensitive business 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

Exploitation requires network reachability to the JD Edwards EnterpriseOne Tools layer specifically over Oracle Net (the Oracle database networking protocol/listener), targeting the Installation Security component on affected Tools versions 9.2.0.0 through 9.2.26.5. Per the CVSS vector (PR:N/UI:N/AC:L) no authentication, no user interaction, and no special non-default configuration are required to achieve unauthorized access to critical data. The principal limiting factor is the Oracle Net exposure requirement: environments that restrict Oracle Net/listener access to trusted network segments or do not expose it to untrusted networks substantially constrain who can reach the vulnerable surface, so practical risk depends heavily on network segmentation rather than on any application-level precondition.

Impact

The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, base 7.5) describes a network-reachable, low-complexity, unauthenticated flaw with high confidentiality impact but no integrity or availability impact - consistent with an information-disclosure/unauthorized-data-access weakness rather than code execution. No EPSS score, CISA KEV listing, or public POC was 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 CVSS signal alone, which is not corroborated by any exploitation-probability data. One notable tension: the vendor-supplied vector is self-consistent (AV:N via Oracle Net), but the description specifies exploitation 'via Oracle Net', which implies reachability of the database/listener network layer rather than a public web endpoint - organizations that do not expose Oracle Net beyond trusted network segments materially reduce exposure, so the AV:N rating may overstate practical reach in well-segmented deployments. Overall this is a genuinely serious confidentiality issue worth prioritized patching for internet- or broadly-reachable JD Edwards installations, but in the absence of EPSS/KEV/POC corroboration it is a high-CVSS issue without confirmed widespread exploitation, and the 'via Oracle Net' constraint should be verified against each environment's network exposure before treating it as remotely trivial.

Exploit ScenarioDerived

An unauthenticated attacker with network access to the JD Edwards EnterpriseOne Tools layer via Oracle Net sends crafted traffic to the vulnerable Installation Security component and obtains unauthorized access to critical application data, potentially reading all data accessible to the EnterpriseOne Tools instance. No authentication, user interaction, or special preconditions are required per the CVSS vector, though network reachability of the Oracle Net service is a practical prerequisite. No public proof-of-concept exploit was provided in the input.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Unauthenticated network attackers can access critical data in JD Edwards EnterpriseOne Tools 9.2.0.0 through 9.2.26.5 by exploiting an Installation Security flaw reachable over Oracle Net. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N, C:H/I:N/A:N) describes a low-complexity confidentiality-only issue with no integrity or availability impact. No public exploit code was identified at time of analysis, and the primary exposure constraint is whether Oracle Net/listener access is reachable from untrusted networks.

RemediationAI

Apply the JD Edwards EnterpriseOne Tools update from Oracle's October 2026 Critical Patch Update; the provided data does not specify an exact fixed Tools version, so confirm the target release in the advisory at https://www.oracle.com/security-alerts/cpuoct2026.html before upgrading. Until patched, restrict network access to the Oracle Net listener and Tools layer to trusted segments using firewall rules or listener ACLs, because the independent assessment identifies Oracle Net exposure as the principal limiting factor. Trade-off: tightening Oracle Net access can break legitimate remote clients, integrations, and administrative connections, so coordinate allow-lists and test connectivity. Monitor for anomalous Oracle Net connections to the Installation Security component.

Affected VersionsENISA

JD Edwards EnterpriseOne Tools 9.2.0.0 ≤9.2.26.5

Affected Packages

euvd jd_edwards_enterpriseone_tools 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 flaw resides in the Installation Security component of Oracle JD Edwards EnterpriseOne Tools, which supports installation and configuration security functions. The attack path is over Oracle Net, Oracle's database networking protocol and listener infrastructure, rather than HTTP, so the vulnerable surface is exposed wherever the Oracle Net listener for the JD Edwards Tools deployment is reachable. The CVSS vector indicates a network-reachable, low-complexity, unauthenticated information-disclosure issue (PR:N/UI:N/AC:L, C:H/I:N/A:N). No CWE is assigned in the provided data, but the 'Authentication Bypass' tag and PR:N vector are consistent with an access-control or authentication weakness that lets an attacker read data they should not reach; there is no evidence in the input of code execution, data modification, or denial of service.

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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 network access via Oracle Net with low complexity (AV:N/AC:L/PR:N/UI:N); impact is unauthorized data access only, so C:H with I:N/A:N.

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 JD Edwards EnterpriseOne Tools product of Oracle JD Edwards (component: Installation Security). Supported versions that are affected are 9.2.0.0-9.2.26.5. Easily exploitable vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise JD Edwards EnterpriseOne Tools. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all JD Edwards EnterpriseOne Tools 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

JD Edwards EnterpriseOne Tools versions 9.2.0.0 through 9.2.26.5 expose a high-severity confidentiality weakness that could allow unauthenticated network users to read critical ERP data when Oracle Net is reachable from untrusted networks. Leadership should care because sensitive financial, supply-chain, or operational data in a core business platform could be disclosed, though no public exploit identified at time of analysis and the primary exposure depends on listener network reachability.

Business Impact: High
Compensating Controls

Restrict Oracle Net listener access to trusted hosts via firewall, security-group, and network ACL rules; segment JD Edwards EnterpriseOne Tools 9.2.0.0 through 9.2.26.5 from untrusted networks; disable unnecessary Oracle Net services; monitor and alert on anomalous listener connections and data-access activity; and apply the vendor patch when it becomes available. No vendor-released patch identified at time of analysis.

Threat Intelligence Overview

EPSS Score
0.3%
Top 78% exploitable
Prevalence
Medium
major Oracle ERP suite, common in large enterprises but industry-specific
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 0.3%
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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