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EnterpriseOne Tools EUVDEUVD-2026-106562

| CVE-2026-91308 HIGH
Information Exposure (CWE-200)
2026-10-20 secalert_us@oracle.com GHSA-7668-jm3c-c8f2
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 listener over network
  2. Delivery
    Send crafted unauthenticated request
  3. Exploit
    Exploit Installation Security flaw
  4. Execution
    Bypass authentication to data
  5. Impact
    Exfiltrate critical application 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 Oracle Net (SQL*Net) communication layer serving JD Edwards EnterpriseOne Tools - the specific channel named in the Oracle advisory, typically TCP 1521 - on a vulnerable instance running Tools 9.2.0.0 through 9.2.26.5. No authentication, no privileges, and no user interaction are needed (PR:N/UI:N), and Oracle rates the attack as 'easily exploitable' (AC:L). The primary limiting factor is network exposure: in properly segmented ERP deployments the Oracle Net listener is not internet-facing and is restricted to internal/application tiers, so an external attacker must first obtain network access to that layer. Confidentiality is the only impact (C:H); integrity and availability are unaffected.

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 HIGH) describes an easily exploitable, network-reachable, unauthenticated flaw with high confidentiality impact but no integrity or availability impact - a pure information-disclosure/data-access issue. All corroborating exploitation signals are absent from the provided data: there is no EPSS probability, no CISA KEV listing, and no POC indicator, so there is NO evidence of active or imminent exploitation. This means the raw 7.5 is driven entirely by the ease and reach of the vector, not by observed threat activity, so it is a genuine patch priority for Oracle Net-exposed JD Edwards deployments but not an emergency on the level of a KEV-listed bug. A key nuance: exposure is via Oracle Net (SQL*Net, typically TCP 1521), which in well-segmented ERP environments is not internet-facing, so real-world reachability - and therefore real risk - depends heavily on network exposure that the CVSS AV:N metric alone does not capture. The 'Authentication Bypass' tag is consistent with the PR:N vector and the 'unauthenticated attacker ... unauthorized access to critical data' language, but Oracle's advisory does not assign a CWE (CWE: N/A), so the precise weakness class is not confirmed.

Exploit ScenarioDerived

An attacker with network reachability to the Oracle Net listener fronting JD Edwards EnterpriseOne Tools sends crafted requests that exploit the Installation Security component without any credentials or user interaction, gaining read access to critical application data. Because the flaw is unauthenticated and rated AC:L ('Easily exploitable' per Oracle), exploitation is straightforward for anyone who can reach the service. No public exploit identified at time of analysis, so this remains a plausible rather than demonstrated attack path.

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 read critical data from Oracle JD Edwards EnterpriseOne Tools 9.2.0.0 through 9.2.26.5 via the Oracle Net communication layer (CVE-2026-91308), which Oracle rates as easily exploitable and assigns CVSS 3.1 7.5 HIGH. The flaw is a confidentiality-only authentication bypass in the Installation Security component: PR:N/UI:N with C:H, while integrity and availability are unaffected. No CISA KEV entry or public exploit code was identified in the supplied intelligence at time of analysis, so risk is highest where the Oracle Net listener is reachable from untrusted networks.

RemediationAI

Apply the Oracle Critical Patch Update October 2026 fix referenced at https://www.oracle.com/security-alerts/cpuoct2026.html; the supplied data does not specify an exact fixed Tools version, so confirm the minimum patched release in Oracle's advisory before upgrading. Until patched, restrict the Oracle Net listener, typically TCP 1521, to trusted application tiers using firewall allowlists and network segmentation, and never expose it to the internet; the trade-off is that distributed clients or integrations requiring direct Oracle Net access will fail unless routed through approved hosts or a VPN. Disable unnecessary Oracle Net services if they are not required, with the trade-off that dependent E1 components or integrations may stop working. Monitor Oracle Net access logs for unexpected source IPs and anomalous access patterns. Patch available per vendor advisory.

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 issue sits in the Installation Security component of JD Edwards EnterpriseOne Tools and is tagged Authentication Bypass; no CWE is supplied. It is exposed through Oracle Net (SQL*Net), typically TCP 1521, meaning the attack surface is the database/application listener rather than a web UI. No CPE strings were provided; EUVD lists affected Tools versions as 9.2.0.0 through 9.2.26.5. The assessed vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, so the root cause class should be treated as an access-control/authentication weakness that permits high-confidentiality data access without credentials or user interaction, with no integrity or availability impact.

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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, easily exploitable network access via Oracle Net (AV:N/AC:L/PR:N/UI:N); high confidentiality-only impact with no integrity or availability effect per the description.

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

Oracle JD Edwards EnterpriseOne Tools versions 9.2.0.0 through 9.2.26.5 expose critical ERP installation data to unauthenticated network attackers through the Oracle Net communication layer. Organizations running these versions face potential unauthorized disclosure of sensitive configuration and environment information if the listener is reachable from untrusted networks. Because no vendor patch is currently available, leadership should prioritize reducing network exposure to protect financial and operational systems of record.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Restrict Oracle Net listener reachability to trusted application and administrative networks via firewall rules or segmentation; enforce least-privilege network access; monitor and log listener connections; apply Oracle configuration hardening guidance for the Installation Security component; and disable unnecessary Oracle Net services where operationally feasible.

Threat Intelligence Overview

EPSS Score
0.3%
Top 78% exploitable
Prevalence
Medium
enterprise ERP suite, common in large orgs but not ubiquitous
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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