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Advanced Outbound Telephony CVE-2026-101630

| EUVDEUVD-2026-106038 MEDIUM
Improper Access Control (CWE-284)
2026-10-20 secalert_us@oracle.com GHSA-mrm3-cfxm-gp36
5.4
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
    Obtain low-privileged EBS account
  2. Delivery
    Craft malicious HTTP request to Telephony component
  3. Exploit
    Lure privileged user to interact
  4. Execution
    Trigger cross-scope flaw
  5. Impact
    Read and tamper with accessible 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 requires the attacker to already hold a low-privileged account on the Oracle E-Business Suite instance (PR:L) and to convince a different, higher-value user to perform an interaction (UI:R), such as following a crafted link or request to the Advanced Outbound Telephony component over HTTP. It applies to EBS versions 12.2.3 through 12.2.15. The dual dependency - valid credentials plus victim interaction - is the primary limiting factor; there is no availability impact, and confidentiality/integrity impact is limited (C:L/I:L). The scope change means successful attacks can extend impact to additional Oracle products beyond the Telephony component itself.

Impact

This is a moderate-severity (CVSS 3.1 base 5.4) vulnerability in Oracle Advanced Outbound Telephony, a module of Oracle E-Business Suite, disclosed in the Oracle Critical Patch Update of October 2026. The CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) shows a network-exploitable, low-complexity flaw but with two meaningful brakes: the attacker must already hold low-level privileges (PR:L) and must induce a separate victim to interact (UI:R). The scope change (S:C) and Oracle's note that attacks 'may significantly impact additional products' are the elevating factors, since compromise can reach beyond the vulnerable component. No EPSS score, CISA KEV listing, or public proof-of-concept was provided in the intelligence set, so real-world exploitation signals are currently absent - this reads as a credentialed, interaction-dependent issue rather than a mass-exploitation priority. One conflict to flag: the input Tags include 'Authentication Bypass', which contradicts the CVSS vector's PR:L (authentication required) and the description's 'low privileged attacker' language - treat the 'Authentication Bypass' characterization as unverified. Overall this is a genuine patch-in-cycle item for EBS operators, not an emergency, absent any exploitation evidence.

Exploit ScenarioDerived

A low-privileged authenticated Oracle E-Business Suite user crafts a malicious link or request targeting the Advanced Outbound Telephony component and lures a more privileged user (e.g., an operator or administrator) into interacting with it over HTTP. The interaction triggers the flaw, allowing limited unauthorized read plus insert/update/delete of some Telephony-accessible data, with impact potentially spilling into adjacent EBS products due to the scope change. No public exploit code was identified at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 21, 2026

Oracle E-Business Suite deployments running Advanced Outbound Telephony in versions 12.2.3 through 12.2.15 expose the Internal Operations component over HTTP to an authenticated low-privileged user who can then induce a second, more privileged victim to interact with a crafted request. Successful exploitation yields limited read access plus insert/update/delete capability over some Telephony-accessible data, and because the CVSS scope is changed (S:C), the impact can propagate into other Oracle products reachable from the compromised module. No KEV listing and no public exploit code were identified at time of analysis, and EPSS data was not supplied; the CVSS 3.1 base score is 5.4 (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N), with no availability impact.

RemediationAI

Apply the Oracle Critical Patch Update for October 2026 (https://www.oracle.com/security-alerts/cpuoct2026.html), which is the vendor's remediation channel for Advanced Outbound Telephony in EBS 12.2.3-12.2.15; the CPU advisory should be consulted for the exact patch set or one-off for your EBS patch level, since no discrete fix version number was supplied in the source data. Because exploitation requires a valid low-privileged EBS account plus victim interaction, the highest-value interim controls are to audit and prune unnecessary low-privileged and self-registered EBS accounts with access to the Telephony module (trade-off: reduces legitimate contact-center operator onboarding until roles are re-baselined) and to restrict network reachability to the EBS HTTP application tier through a reverse proxy or WAF that only exposes the paths your business actually uses, blocking direct access to Internal Operations endpoints from untrusted networks (trade-off: can break integrated clients and mobile workflows until allow-listed). Where the module's Internal Operations functions are not in active use, disable or de-provision them on the EBS application tier (trade-off: any dependent customizations or integrations will fail). Complement these with user awareness for the UI:R vector - staff should not follow unsolicited links into EBS - and monitor EBS access logs for anomalous Telephony requests originating from low-privileged sessions, particularly those correlated with a second user's near-simultaneous activity. Vendor-released patch: Oracle Critical Patch Update, October 2026, per vendor advisory.

Affected VersionsENISA

Oracle Advanced Outbound Telephony 12.2.3 ≤12.2.15

Affected Packages

euvd oracle_advanced_outbound_telephony 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 lives in Oracle Advanced Outbound Telephony, a contact-center module of Oracle E-Business Suite that runs on the EBS application tier and is reached by users through HTTP(S) against the EBS middle-tier services. The root cause class is not formally enumerated in the source data (CWE is N/A), but the assessed vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) describes a server-side authorization/logic weakness reachable over the network with low attack complexity by a user who already holds a valid low-privileged EBS account, and which only triggers when a different user is persuaded to perform an interaction (UI:R) - typically following a crafted link or submitting a crafted request. The scope change (S:C) is significant: although the weakness resides in the Telephony component, a successful attack can affect resources beyond that component's security authority, meaning adjacent Oracle products integrated with the same EBS session and trust boundary may also be impacted. Impacts are limited to partial confidentiality and integrity loss with no availability effect. No CPE strings were provided in the intelligence feed; EUVD confirms the affected range as Oracle Advanced Outbound Telephony 12.2.3 through 12.2.15.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (oracle) PRIMARY 5.4 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
vuln.today AI 5.4 MEDIUM

Network HTTP vector with low complexity, but requires an existing low-privilege account (PR:L) and victim interaction (UI:R); scope change with limited C/I and no availability impact.

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

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

DescriptionCVE.org

Vulnerability in the Oracle Advanced Outbound Telephony product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Advanced Outbound Telephony. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle Advanced Outbound Telephony, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Advanced Outbound Telephony accessible data as well as unauthorized read access to a subset of Oracle Advanced Outbound Telephony accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Threat Intelligence Overview

EPSS Score
0.2%
Top 87% exploitable
Prevalence
Medium
Specific EBS telephony/CRM module, narrower footprint than core EBS
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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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· derived
Medium

Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +27
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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