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JD Edwards EnterpriseOne EUVDEUVD-2026-106580

| CVE-2026-91326 HIGH
Improper Access Control (CWE-284)
2026-10-20 secalert_us@oracle.com GHSA-cc4j-pqgv-hhp9
8.8
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
    Gain access to adjacent network segment
  2. Delivery
    Deliver crafted traffic during install/security flow
  3. Exploit
    Induce operator interaction (UI:R)
  4. Execution
    Exploit Installation Security flaw
  5. Impact
    Take over EnterpriseOne Tools and pivot to connected products

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

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

Exploitation Conditions

Exploitation requires the attacker to have access to the physical/adjacent communication segment attached to the hardware running JD Edwards EnterpriseOne Tools (AV:A - not routable over the internet), and it requires human interaction from a person other than the attacker (UI:R), specifically during an Installation Security operation. No authentication is needed (PR:N), and attack complexity is low (AC:L). The vulnerability carries a scope change (S:C), meaning successful attacks may significantly impact additional connected products beyond EnterpriseOne Tools itself. The adjacency requirement and dependency on a victim operator's action are the primary limiting factors restricting realistic exploitation. Affected versions are 9.2.0.0 through 9.2.26.4.

Impact

This is a genuinely high-severity issue but not a drop-everything emergency. The confirmed CVSS 3.1 vector (AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H, base 8.8) shows an unauthenticated, low-complexity attack yielding full confidentiality, integrity, and availability compromise with a scope change - hence the 8.8. However, two metrics materially constrain real-world risk: AV:A means the attacker must be on the same physical/adjacent communication segment as the JD Edwards EnterpriseOne Tools hardware (not internet-reachable), and UI:R means a separate human must perform an action for the attack to succeed. No EPSS score was provided in the input, there is no CISA KEV listing, and no public POC was identified, so there is no exploitation-probability or active-exploitation signal to corroborate the high CVSS. No SSVC decision data was supplied. Net: treat as a high-priority patch during the normal Oracle CPU cycle rather than an emergency; the adjacency + user-interaction requirements make mass or remote exploitation unlikely, pointing toward opportunistic or insider/lateral-movement scenarios rather than internet-wide attacks. Note also a tag inconsistency: the input tags this as 'Information Disclosure,' yet the vector and description describe full product takeover (C:H/I:H/A:H), so the tag understates impact - verify categorization.

Exploit ScenarioDerived

An attacker positioned on the local network segment attached to the JD Edwards EnterpriseOne Tools server intercepts or injects traffic during an installation/security operation and waits for a legitimate operator to take an expected action. When that user interacts, the crafted input is processed, resulting in takeover of EnterpriseOne Tools and, due to the scope change, impact on connected downstream products. No public exploit code was identified at the time of analysis.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Adjacent-network attackers can exploit an installation-security weakness in JD Edwards EnterpriseOne Tools 9.2.0.0 through 9.2.26.4 to take over the product, provided a person other than the attacker performs a required interaction; no authentication is needed and the scope change means connected products may also be affected. The CVSS 3.1 score is 8.8, but exploitation is constrained by the AV:A adjacency requirement and UI:R human interaction. No public exploit identified at time of analysis and no CISA KEV entry is present in the available data.

RemediationAI

Apply the JD Edwards EnterpriseOne Tools update identified in Oracle's Critical Patch Update October 2026 advisory at https://www.oracle.com/security-alerts/cpuoct2026.html; because the provided data does not give an exact fixed version, confirm the target release with Oracle before upgrading and treat 9.2.0.0 through 9.2.26.4 as affected. If patching must wait, reduce exposure by restricting physical and adjacent-network access to EnterpriseOne Tools hosts through network segmentation, 802.1X, and ACLs, and require trusted operators to run Installation Security operations only from controlled consoles; trade-offs include operational friction and possible delay of legitimate installation work. Monitor installation-security activity and adjacent-segment access for signs of unexpected actions, but note these controls do not remove the scope-change risk to connected products.

Affected VersionsENISA

JD Edwards EnterpriseOne Tools 9.2.0.0 ≤9.2.26.4

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

JD Edwards EnterpriseOne Tools is Oracle's tooling layer for the JD Edwards EnterpriseOne ERP environment, and the affected component is Installation Security. The provided data does not include a CWE, so the precise root-cause class is undisclosed; the CVSS vector shows AV:A (access to the physical/adjacent communication segment, not internet-routable), AC:L (low complexity), PR:N (no authentication), UI:R (victim interaction), and S:C (scope change) with high confidentiality, integrity, and availability impact. The source tags include Information Disclosure, but the vector and independent assessment describe a takeover-level impact rather than simple data exposure; successful exploitation may also significantly affect additional connected products because of the scope change.

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Severity by source

Vendor (oracle) PRIMARY 8.8 HIGH
AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
vuln.today AI 8.8 HIGH

Attacker needs adjacent-segment access (AV:A) and an operator action (UI:R) but no auth (PR:N); low complexity, scope change, and full C/I/A loss give takeover-level impact.

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Vulnerability in the JD Edwards EnterpriseOne Tools product of Oracle JD Edwards (component: Installation Security). Supported versions that are affected are 9.2.0.0-9.2.26.4. Easily exploitable vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the JD Edwards EnterpriseOne Tools executes to compromise JD Edwards EnterpriseOne Tools. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in JD Edwards EnterpriseOne Tools, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of JD Edwards EnterpriseOne Tools. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H).

Executive ViewAI

Why It Matters

JD Edwards EnterpriseOne Tools releases 9.2.0.0 through 9.2.26.4 contain a high-severity installation-security flaw that lets an attacker positioned on an adjacent network segment take over the ERP product, and because the vulnerability crosses trust boundaries, other connected Oracle products may also be at risk. The attacker needs no credentials of their own, but a legitimate user must be persuaded to perform an action, so a single convincing prompt to a finance or supply-chain user could be enough to hand over control. Leadership should care because JD Edwards underpins core financial and operational processes and no vendor patch exists at time of analysis, leaving network segmentation and user-behavior controls as the only defenses.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: segment JD Edwards EnterpriseOne Tools away from untrusted adjacent networks and restrict listener ports to approved administrative subnets via firewall/ACL rules; enforce multi-factor authentication and least privilege on all interactive ERP accounts and confine sessions to managed devices; warn users against social-engineering lures that could supply the required interaction; monitor for anomalous connections from adjacent segments and for unusual post-login activity; and treat any suspected compromise as a scope-crossing incident that may extend to connected Oracle products.

Threat Intelligence Overview

EPSS Score
0.2%
Top 87% exploitable
Prevalence
Medium
widely-used Oracle ERP tooling, but specific enterprise product, 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 0.2%
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
Controlled
Automatable· derived
No
Human Impact
High

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
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.

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