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Oracle EBS MWA CVE-2026-101829

| EUVDEUVD-2026-106228 HIGH
Improper Access Control (CWE-284)
2026-10-20 secalert_us@oracle.com GHSA-x5rv-4g35-jcv5
7.4
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 MWA Terminal Server over HTTP
  2. Delivery
    Send crafted request to MWA endpoint
  3. Exploit
    Satisfy high-complexity exploit precondition
  4. Execution
    Gain unauthorized data read/write
  5. Impact
    Exfiltrate or tamper with critical EBS data

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 targets the MWA Terminal Server component of Oracle Mobile Application Server (part of Oracle E-Business Suite) reachable over HTTP, affecting versions 12.2.3 through 12.2.15. No authentication is required (PR:N) and no user interaction is needed (UI:N), so the server simply needs to be network-reachable by the attacker. The principal limiting factor is the high attack complexity (AC:H): Oracle classifies this as 'difficult to exploit,' indicating success depends on a specific, hard-to-control condition (such as particular timing, state, or configuration of the MWA service) rather than a straightforward single request. Impact is limited to confidentiality and integrity of server-accessible data; there is no availability/denial-of-service impact (A:N) and no privilege-scope change (S:U). Realistic exposure is further bounded by whether the MWA Terminal Server is exposed beyond trusted internal/warehouse-handheld networks.

Impact

This is a genuine but non-top-priority issue that warrants prompt patching rather than emergency response. The CVSS 3.1 base score of 7.4 is driven by network vector (AV:N over HTTP), no authentication (PR:N), and no user interaction (UI:N), combined with high Confidentiality and Integrity impact (C:H/I:H) - an unauthenticated remote attacker who succeeds can read and alter all data accessible to the Mobile Application Server. The key mitigating signal is AC:H ('Difficult to exploit'), which Oracle explicitly reinforces in the description; this generally reflects a dependency on specific timing, configuration, or a non-trivial precondition the attacker cannot fully control. No EPSS score was supplied, the CVE is NOT listed in CISA KEV, and no public POC is referenced, so there is no evidence of active exploitation or weaponization. The signals are internally consistent (no conflicts between the vector and the description), but the picture is incomplete: no EPSS, no CWE, and only an Oracle CPU bulletin reference. Net assessment: treat as a high-severity data-exposure/data-tampering flaw in an enterprise Oracle product, prioritized within the normal Oracle quarterly CPU patch cycle, with the AC:H complexity lowering near-term mass-exploitation likelihood.

Exploit ScenarioDerived

A remote attacker without credentials sends specially crafted HTTP traffic to an internet- or network-reachable Oracle Mobile Application Server (MWA Terminal Server component) and, after satisfying the difficult-to-meet exploitation conditions implied by AC:H, gains unauthorized read and write access to all data the server can reach. This could allow exfiltration of sensitive E-Business Suite data and unauthorized creation, modification, or deletion of critical records. No public exploit code is identified at time of analysis.

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 21, 2026

Unauthenticated network attackers can read and modify critical data in Oracle E-Business Suite's Mobile Application Server (MWA Terminal Server) versions 12.2.3 through 12.2.15, with a CVSS 3.1 score of 7.4. Oracle rates the issue difficult to exploit because of high attack complexity, and no public exploit code or CISA KEV active-exploitation signal was identified at time of analysis. Exposure is greatest where the MWA Terminal Server is reachable beyond trusted internal or warehouse-handheld networks.

RemediationAI

Apply the Oracle Critical Patch Update for October 2026 to Oracle E-Business Suite 12.2.3 through 12.2.15, following the vendor advisory at https://www.oracle.com/security-alerts/cpuoct2026.html; the input does not provide an exact patched build number, so validate the fixed revision in the CPU documentation. If patching must wait, restrict HTTP access to the MWA Terminal Server to trusted internal or warehouse-handheld network segments using firewall or reverse-proxy ACLs, and disable or block the MWA endpoint entirely where mobile access is not required. The trade-off is loss of mobile and handheld connectivity for legitimate users, so stage ACLs against an inventory of client subnets and monitor MWA and server logs for anomalous unauthenticated requests during the exposure window.

Affected VersionsENISA

Oracle Mobile Application Server 12.2.3 ≤12.2.15

Affected Packages

euvd oracle_mobile_application_server 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

Oracle E-Business Suite's Mobile Application Server exposes the MWA Terminal Server component over HTTP to support mobile and handheld warehouse clients. The CVSS vector shows network reachability, no required privileges, no user interaction, unchanged scope, and high confidentiality and integrity impact without availability impact; the supplied 'Authentication Bypass' tag is consistent with the PR:N vector but the exact root-cause class cannot be confirmed because no CWE was provided. Oracle's high attack-complexity rating means success depends on a hard-to-control condition such as timing, state, or configuration of the MWA service rather than a straightforward single request. The EUVD entry tracks Oracle Mobile Application Server 12.2.3 through 12.2.15, and no CPE data was included. The relevant vendor reference is the October 2026 Oracle Critical Patch Update.

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Severity by source

Vendor (oracle) PRIMARY 7.4 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
vuln.today AI 7.4 HIGH

Unauthenticated HTTP access gives AV:N/PR:N/UI:N; Oracle's 'difficult to exploit' justifies AC:H; data read/write without DoS gives C:H/I:H/A:N, scope unchanged.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/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
High
Integrity
High
Availability
None

DescriptionCVE.org

Vulnerability in the Oracle Mobile Application Server product of Oracle E-Business Suite (component: MWA Terminal Server). Supported versions that are affected are 12.2.3-12.2.15. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Mobile Application Server. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Mobile Application Server accessible data as well as unauthorized access to critical data or complete access to all Oracle Mobile Application Server accessible data. CVSS 3.1 Base Score 7.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).

Executive ViewAI

Why It Matters

Oracle E-Business Suite Mobile Application Server (MWA Terminal Server) versions 12.2.3 through 12.2.15 carry a high-severity flaw that could allow network-reachable attackers to read or modify critical business data. No vendor-released patch identified at time of analysis and no public exploit identified at time of analysis, so leadership should prioritize reducing external exposure and monitoring data integrity until a fix is available.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis; restrict MWA Terminal Server network exposure to trusted internal or warehouse-handheld networks, use firewall/ACL allowlists, enforce least privilege for application accounts, and monitor/alert on anomalous data access or modification.

Threat Intelligence Overview

EPSS Score
0.3%
Top 77% exploitable
Prevalence
Medium
Oracle EBS common in large enterprises, but MWA mobile component is niche
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
No
Human Impact
High

Priority Score

37
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +37
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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