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Oracle Identity Manager Connector EUVDEUVD-2026-24380

| CVE-2026-34294 MEDIUM
Improper Access Control (CWE-284)
2026-04-21 oracle
5.9
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 OIM Connector credential
  2. Delivery
    Establish LDAP network access to connector endpoint
  3. Exploit
    Craft malformed LDAP request targeting AD component
  4. Execution
    Satisfy high-complexity exploitation conditions
  5. Persist
    Bypass access control enforcement
  6. Impact
    Modify or read critical Active Directory-connected 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 an attacker to hold a low-privileged account with network access to the Oracle Identity Manager Connector instance (PR:L per CVSS). The vulnerable code path is specifically within the Microsoft Active Directory component, meaning the OIM Connector deployment must be actively configured to integrate with Active Directory via LDAP - deployments not using the AD connector component are not exposed. High attack complexity (AC:H) indicates that exploitation is not straightforward against default conditions; specific prerequisites such as timing-dependent states, particular LDAP request structures, or environmental configurations must be satisfied. No user interaction is required once conditions are met. Limiting factors include: the requirement for a valid low-privileged credential (unauthenticated exploitation is not possible per PR:L), the non-trivial attack complexity that prevents automated or opportunistic exploitation (confirmed by SSVC Automatable: no), and the constraint that only the Active Directory-connected configuration surface is vulnerable.

Impact

Real-world risk is moderate-to-low despite the high integrity impact metric. The CVSS vector (AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N) confirms network reachability but imposes two significant friction points: the attacker must hold a low-privileged account (PR:L) and must overcome high attack complexity (AC:H), which typically indicates race conditions, specific timing windows, or non-default environmental states. EPSS at 0.03% (8th percentile) signals extremely low exploitation activity in the threat landscape, consistent with the SSVC assessment of Exploitation: none, Automatable: no, and Technical Impact: partial. There is no CISA KEV listing and no known public proof-of-concept. The integrity impact is rated High, which elevates CVSS, but this reflects worst-case potential rather than confirmed exploitation behavior. On balance, this vulnerability should be patched in the normal Oracle CPU patching cycle without emergency escalation, but environments where OIM Connector has direct write authority over production Active Directory should prioritize the update given the integrity risk. No conflicting signals are present in the available data.

Exploit ScenarioDerived

A low-privileged account holder with LDAP network access to Oracle Identity Manager Connector - such as a standard OIM service account or an internal attacker who has compromised a low-privilege credential - submits a specially crafted LDAP request to the Microsoft Active Directory connector component. By exploiting the improper access control flaw under the specific conditions required by AC:H (such as a race condition or a particular request sequence), the attacker bypasses authorization checks and issues unauthorized create, delete, or modify operations against critical directory objects, potentially altering group memberships, disabling accounts, or reading sensitive directory data. No public proof-of-concept has been identified, so exploitation would require independent vulnerability research.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 24, 2026

Improper access control in Oracle Identity Manager Connector 12.2.1.4.0 exposes the Microsoft Active Directory component to network-based exploitation via LDAP, enabling low-privileged authenticated attackers to perform unauthorized creation, deletion, or modification of critical data and read a subset of accessible data. The vulnerability carries a CVSS 3.1 score of 5.9 (Medium), tempered by high attack complexity (AC:H) and a near-zero EPSS of 0.03% (8th percentile). No public exploit code exists and no active exploitation has been reported; this is a real but difficult-to-trigger integrity-focused flaw in Oracle's enterprise identity management stack.

RemediationAI

Apply the Oracle Critical Patch Update (CPU) for April 2026, available via the Oracle Security Alerts portal at https://www.oracle.com/security-alerts/cpuapr2026.html. Oracle does not publish individual patched version numbers in CPU summaries; administrators should consult My Oracle Support and the CPU advisory for the specific patch number applicable to Oracle Identity Manager Connector 12.2.1.4.0. As a compensating control pending patching, restrict LDAP access to the OIM Connector's Active Directory integration endpoint to only explicitly authorized service accounts and privileged identity workstations via network-layer ACLs or firewall rules - this reduces the attack surface by limiting which authenticated principals can reach the vulnerable interface. Additionally, audit low-privileged OIM Connector accounts for unnecessary Active Directory write permissions and apply least-privilege scoping to connector service accounts. These controls reduce but do not eliminate risk, as the flaw is in the connector's authorization logic rather than network exposure alone.

Affected VersionsENISA

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

Oracle Identity Manager Connector (OIM Connector) is an enterprise identity governance component of Oracle Fusion Middleware that synchronizes and provisions user accounts between Oracle Identity Manager and external directories, including Microsoft Active Directory, via the LDAP protocol. The affected version is 12.2.1.4.0, identified by CPE cpe:2.3:a:oracle_corporation:oracle_identity_manager_connector:*:*:*:*:*:*:*:*. The root cause is CWE-284 (Improper Access Control), meaning the connector's LDAP integration layer fails to enforce sufficient authorization checks on operations directed at Active Directory, allowing a low-privileged authenticated principal to exceed their intended permissions and perform write-level operations (create, delete, modify) on critical data objects. The AD component tag further confirms the flaw resides specifically in the connector's handling of Active Directory-bound LDAP transactions rather than the OIM core engine itself.

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Severity by source

Vendor (oracle) PRIMARY 5.9 MEDIUM
AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
vuln.today AI 5.9 MEDIUM

Network exploitation via LDAP with low privilege and high complexity conditions required; high integrity impact from unauthorized directory write operations; no availability or scope change.

3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
4.0 AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/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
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None

DescriptionCVE.org

Vulnerability in the Oracle Identity Manager Connector product of Oracle Fusion Middleware (component: Microsoft Active Directory). The supported version that is affected is 12.2.1.4.0. Difficult to exploit vulnerability allows low privileged attacker with network access via LDAP 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 read access to a subset of Oracle Identity Manager Connector accessible data. CVSS 3.1 Base Score 5.9 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N).

Threat Intelligence Overview

EPSS Score
0.0%
Top 92% exploitable
Prevalence
Low
enterprise Oracle IAM product, limited to Oracle Fusion Middleware deployments
Data Quality
5 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 0.0%
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
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +30
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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