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Oracle Fusion Middleware EUVDEUVD-2026-106808

| CVE-2026-91616 LOW
Information Exposure (CWE-200)
2026-10-20 secalert_us@oracle.com GHSA-gcxm-3vfx-j323
3.7
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 exposed Remote Diagnostic Agent over HTTP
  2. Exploit
    Send crafted request under required conditions
  3. Impact
    Read subset of accessible 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 targets the Remote Diagnostic Agent component of Oracle Middleware Common Libraries and Tools on affected versions 12.2.1.4.0 and 14.1.1.0.0, reachable over HTTP without authentication (PR:N, UI:N). The key LIMITING factor is the high attack complexity (AC:H): Oracle classifies this as 'difficult to exploit,' meaning success depends on conditions beyond the attacker's control - likely specific timing, server state, or non-default exposure of the diagnostic interface - rather than a simple repeatable request. Impact is bounded to read access to a subset of data (C:L), with no write or availability consequence. Realistic risk is further reduced where the Remote Diagnostic Agent / middleware management endpoints are not exposed to untrusted networks.

Impact

This is a genuinely low-priority issue despite the unauthenticated network vector. The CVSS 3.1 base score is only 3.7 (LOW), and the vector tells a consistent story: AV:N/PR:N/UI:N means a remote, unauthenticated attacker can reach it over HTTP, but AC:H flags high attack complexity - exploitation depends on conditions outside the attacker's control (timing, configuration, or specific state), making reliable exploitation difficult. The impact is limited to C:L (partial read access to a subset of data) with no integrity or availability effect, so there is no code execution, no data modification, and no denial of service. No EPSS score, CISA KEV listing, POC, or SSVC data was provided, so there is no public exploit identified at time of analysis and no evidence of active exploitation. The signals are internally consistent - a low-severity information-disclosure bug that is hard to trigger. Note one metadata conflict: the input Tags include 'Authentication Bypass,' but the description describes unauthorized read access to a data subset, not a bypass of authentication; the PR:N simply reflects that the affected function requires no privileges, not that an auth control is circumvented. Treat this as routine-patch priority, not emergency.

Exploit ScenarioDerived

A remote, unauthenticated attacker sends specially crafted HTTP requests to an exposed Oracle Middleware Common Libraries and Tools instance (Remote Diagnostic Agent component), attempting to trigger the flaw under the narrow conditions required by the high attack complexity. If successful, the attacker reads a limited subset of accessible data (e.g., diagnostic or configuration information). No public exploit code has been identified for this CVE.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Remote, unauthenticated read access to a limited subset of diagnostic data in Oracle Fusion Middleware Common Libraries and Tools 12.2.1.4.0 and 14.1.1.0.0 is possible through the Remote Diagnostic Agent over HTTP, but exploitation is difficult (AC:H) and depends on conditions outside the attacker's control. Oracle's October 2026 CPU assigns a low CVSS 3.1 base score of 3.7 with confidentiality-only impact (C:L), and no public exploit code or confirmed active exploitation has been identified at time of analysis. Real-world risk is substantially lower where diagnostic and management endpoints are not exposed to untrusted networks.

RemediationAI

Apply the Oracle Critical Patch Update for October 2026 to Oracle Middleware Common Libraries and Tools 12.2.1.4.0 and 14.1.1.0.0; the advisory at https://www.oracle.com/security-alerts/cpuoct2026.html lists the vendor fixes, and patch availability is confirmed per vendor advisory, though no separate exact fix version was provided in the input. If immediate patching is not possible, reduce exposure by blocking network access to the Remote Diagnostic Agent and HTTP diagnostic endpoints at the perimeter and host firewall, and disable RDA or the diagnostic listener where it is not operationally required, accepting the trade-off of losing diagnostic collection capability. Restrict management interfaces to trusted administrative networks and monitor for anomalous HTTP requests to RDA paths; these controls lower risk but do not remediate the underlying access-control weakness.

Affected VersionsENISA

Oracle Middleware Common Libraries and Tools 12.2.1.4.0
Oracle Middleware Common Libraries and Tools 14.1.1.0.0

Affected Packages

euvd oracle_middleware_common_libraries_and_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 Remote Diagnostic Agent (RDA) is a diagnostic collection utility shipped within Oracle Fusion Middleware Common Libraries and Tools; it exposes an HTTP-reachable interface used to gather configuration and runtime diagnostics. The issue is tagged as an Authentication Bypass and allows an unauthenticated network attacker to read a subset of data accessible to the agent, but no CWE identifier is provided in the input data. Oracle's high attack complexity (AC:H) rating indicates this is not a simple repeatable request: success likely hinges on specific server state, timing, or non-default exposure of the diagnostic interface, which sharply limits exploitability. The CVSS vector confirms network reachability, no privileges required, no user interaction, unchanged scope, and confidentiality-only impact (C:L) with no integrity or availability effect.

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Severity by source

Vendor (oracle) PRIMARY 3.7 LOW
AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI 3.7 LOW

Remote unauthenticated HTTP reach gives AV:N/PR:N/UI:N; Oracle's 'difficult to exploit' maps to AC:H; impact is a partial data read only, so C:L with I:N/A:N.

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

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

DescriptionCVE.org

Vulnerability in the Oracle Middleware Common Libraries and Tools product of Oracle Fusion Middleware (component: Remote Diagnostic Agent). Supported versions that are affected are 12.2.1.4.0 and 14.1.1.0.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Middleware Common Libraries and Tools. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Middleware Common Libraries and Tools accessible data. CVSS 3.1 Base Score 3.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N).

Threat Intelligence Overview

EPSS Score
0.2%
Top 88% exploitable
Prevalence
Medium
Oracle Fusion Middleware is common in enterprises, but this is a specific diagnostic component
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 LOW
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
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
Defer
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Low

Priority Score

18
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +18
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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

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