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Oracle Identity Manager EUVDEUVD-2026-106734

| CVE-2026-91489 HIGH
Improper Access Control (CWE-284)
2026-10-20 secalert_us@oracle.com GHSA-pfr4-mcqj-5jh3
7.1
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 logon on connector host
  2. Delivery
    Reach LDAP Gateway component locally
  3. Exploit
    Exploit vulnerability (low complexity)
  4. Execution
    Read/modify critical identity data
  5. Impact
    Unauthorized account creation/deletion/modification

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

Requires the attacker to have interactive logon access to the infrastructure/host where the Oracle Identity Manager Connector (LDAP Gateway component) executes, plus low-level privileges on that system (CVSS PR:L, AV:L). Affected deployments are specifically Oracle Identity Manager Connector versions 12.2.1.4.0 and 14.1.2.1.0. No user interaction is needed (UI:N) and complexity is low (AC:L), so once local authenticated access exists exploitation is straightforward. Limiting factors: this is NOT remotely or network exploitable and NOT unauthenticated - the mandatory local logon and existing privilege requirement substantially constrain the realistic attacker population to insiders or those who have already breached the host.

Impact

This is a genuine but bounded enterprise risk rather than a drop-everything emergency. The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N, 7.1 HIGH) is internally consistent and the key constraint is AV:L combined with PR:L: an attacker must already have local logon access to the infrastructure where the Oracle Identity Manager Connector runs AND hold low-level privileges there. That materially lowers real-world exploitability compared to a network-facing unauthenticated flaw, even though AC:L means exploitation is trivial once that foothold exists. No EPSS score was supplied, the CVE is not in CISA KEV, and no public POC is referenced, so there is no evidence of active or opportunistic exploitation. The high Confidentiality and Integrity impacts (no Availability impact) on an identity-management component are the most concerning element, because compromise of an IAM connector can cascade into broader credential/identity abuse. Signal conflict to note explicitly: the input Tag 'Authentication Bypass' contradicts the official description and CVSS, which require an authenticated, logged-on low-privileged attacker - this is not an unauthenticated auth-bypass, so treat that tag as unreliable and verify against Oracle's CPU advisory.

Exploit ScenarioDerived

A low-privileged user (or an attacker who has already gained a limited local foothold, e.g. via a compromised service account) with logon access to the host running the Oracle Identity Manager Connector LDAP Gateway abuses the flaw to read and alter identity data the connector can access. Because the connector brokers identity operations, this enables unauthorized creation, modification, or deletion of account/entitlement data. No public exploit code is identified at time of analysis, and exploitation requires pre-existing local access, limiting opportunistic use.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Oracle Identity Manager Connector (LDAP Gateway component) in versions 12.2.1.4.0 and 14.1.2.1.0 allows a low-privileged user who already has interactive logon to the connector host to read, create, delete, or modify all data reachable through the LDAP Gateway, per Oracle's October 2026 Critical Patch Update. The 7.1 score reflects high confidentiality and integrity impact with no availability impact (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N), so exploitation is straightforward but strictly gated behind existing local access and low-level privileges, making this a bounded insider or post-compromise risk rather than a remote threat. No public exploit code and no confirmed active exploitation were identified at time of analysis.

RemediationAI

Apply the Oracle Critical Patch Update for October 2026, which is the vendor-released fix for this issue; confirm the exact patched connector build in the CPU risk matrix at https://www.oracle.com/security-alerts/cpuoct2026.html before upgrading, as no discrete fix version number was published in the supplied data. Where the CPU cannot be applied immediately, reduce exposure by removing interactive logon rights for non-administrative users on hosts running the LDAP Gateway (trade-off: constrains shared-jump-host workflows and requires re-provisioning of operator accounts), running the connector under a dedicated service account with the minimum directory permissions needed for provisioning and reconciliation (trade-off: broad directory write rights may need to be split into narrower delegated roles, which can break bulk reconciliation jobs), and tightening filesystem and keystore permissions on connector configuration, bind-credential, and log directories so low-privileged local users cannot read or modify them (trade-off: may require re-acl of existing installs). Additionally, monitor connector and directory audit logs for anomalous read, create, delete, or modify activity originating from the gateway host, and treat any host running the connector as a high-value asset for host-based detection and lateral-movement controls.

Affected VersionsENISA

Oracle Identity Manager Connector 14.1.2.1.0
Oracle Identity Manager Connector 12.2.1.4.0

Affected Packages

euvd oracle_identity_manager_connector 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 affected component is the LDAP Gateway shipped with Oracle Identity Manager Connector, the integration layer that synchronizes identities, accounts, and entitlements between Oracle Identity Manager and external LDAP directories such as Active Directory or Oracle Unified Directory. Because the gateway handles directory bind credentials, connector configuration, and reconciliation/provisioning data flows, a weakness in its local access controls lets a user who can already log on to the host read or alter that material and, through it, the connected directory data. Oracle did not assign a CWE, but the CVSS vector (AV:L/PR:L/UI:N/S:U/C:H/I:H/A:N) and the accompanying 'Authentication Bypass' tag point to an authorization/access-control defect rather than a memory-safety or injection flaw: no user interaction, low attack complexity, and scope unchanged, meaning the attacker gains control of data the gateway can reach but does not formally escape to other security authorities. Exploitation requires local logon and existing low privileges, which confines the realistic attacker population to insiders, co-tenanted hosts, or intruders who have already established a foothold on the connector infrastructure.

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Severity by source

Vendor (oracle) PRIMARY 7.1 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
vuln.today AI 7.1 HIGH

Description mandates local logon with low privileges, so AV:L/PR:L/AC:L; high confidentiality and integrity to identity data with no availability impact and no scope change.

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

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

DescriptionCVE.org

Vulnerability in the Oracle Identity Manager Connector product of Oracle Fusion Middleware (component: LDAP Gateway). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.1.0. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Identity Manager Connector executes to compromise Oracle Identity Manager Connector. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Identity Manager Connector accessible data as well as unauthorized access to critical data or complete access to all Oracle Identity Manager Connector accessible data. CVSS 3.1 Base Score 7.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).

Executive ViewAI

Why It Matters

Oracle Identity Manager Connector's LDAP Gateway component in versions 12.2.1.4.0 and 14.1.2.1.0 carries a high-severity flaw that allows an already-authenticated low-privileged local user to read, create, modify, or delete all data reachable through the gateway, directly threatening the confidentiality and integrity of identity data managed by the platform. Because exploitation requires existing interactive logon to the connector host, the exposure is concentrated among insiders, compromised accounts, and post-breach lateral movement rather than external actors. Leadership should treat this as a bounded but serious identity-infrastructure risk, particularly given that no vendor patch is currently available.

Business Impact: Medium
Compensating Controls

No vendor-released patch identified at time of analysis; interim mitigations include restricting interactive logon to connector hosts, enforcing least privilege and just-in-time administrative access, segmenting connector hosts from general networks, monitoring and alerting on LDAP Gateway data operations, and auditing local account activity.

Threat Intelligence Overview

EPSS Score
0.1%
Top 98% exploitable
Prevalence
Low
specialized Oracle enterprise IAM connector, limited to OIM deployments
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 0.1%
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
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact
Medium

Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +36
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

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