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Oracle Unified Directory EUVDEUVD-2026-61446

| CVE-2026-60850 HIGH
Improper Access Control (CWE-284)
2026-08-18 secalert_us@oracle.com GHSA-8j2w-6f6r-9p7c
7.5
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
    Identify OUD LDAP endpoint on network
  2. Delivery
    Send unauthenticated LDAP bind request
  3. Exploit
    Bypass OUD Core authentication check
  4. Execution
    Issue LDAP search queries across directory tree
  5. Impact
    Exfiltrate user credentials and organizational 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

No special conditions are required for exploitation - this is remote unauthenticated exploitation against default configurations of Oracle Unified Directory via the LDAP protocol. The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms network reachability over LDAP is the only prerequisite. Exploitation is limited by: (1) network access to the LDAP service port, so deployments with the OUD LDAP interface firewalled from untrusted networks have reduced exposure; (2) scope is restricted to confidentiality - attackers cannot modify directory data or disrupt availability through this vulnerability alone; (3) only versions 12.2.1.4.0 and 14.1.2.1.0 are confirmed affected, so deployments on other versions or already patched instances are not impacted.

Impact

The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) scores 7.5 and represents a straightforwardly dangerous posture: network-reachable, low complexity, no credentials, no user interaction required. The confidentiality impact is rated High, meaning full read access to all directory-accessible data - which in an LDAP directory typically includes usernames, email addresses, group memberships, hashed or cleartext credentials, and organizational structures. No EPSS score was provided in the input data; this limits probabilistic exploitation likelihood assessment. The vulnerability is not listed in the CISA KEV catalog and no public proof-of-concept has been identified at time of analysis, which moderates urgency somewhat. However, the 'easily exploitable' language in the Oracle description, combined with PR:N and AC:L, means any threat actor with network access to the LDAP port can trivially attempt exploitation - even a mid-sized municipal IT team in bytom should treat this as urgent if OUD is internet-exposed or reachable from untrusted network segments. The absence of integrity and availability impact (I:N/A:N) narrows the blast radius to data exfiltration, but LDAP directories frequently contain credentials that enable lateral movement.

Exploit ScenarioDerived

An unauthenticated attacker with network access to the OUD LDAP port sends a crafted LDAP request that bypasses the authentication check in OUD Core, successfully binding to the directory without valid credentials. The attacker then issues LDAP search queries to enumerate all accessible directory objects - user accounts, hashed passwords, group memberships, and organizational attributes - exfiltrating this data for use in credential stuffing or lateral movement. No proof-of-concept code has been identified in the available data, but the low attack complexity and absence of authentication requirements make this straightforward to exploit with standard LDAP client tooling.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 18, 2026

Unauthenticated confidentiality breach in Oracle Unified Directory (OUD Core) exposes all directory-accessible data via LDAP. Both supported releases - 12.2.1.4.0 and 14.1.2.1.0 - are affected, confirming this is not a legacy-only issue. The 'Authentication Bypass' tag combined with a PR:N/AV:N CVSS vector indicates attackers can read sensitive directory contents without credentials over the network; no public exploit or CISA KEV listing has been identified at time of analysis.

RemediationAI

Apply the Oracle Critical Security Patch Update for August 2026, available at https://www.oracle.com/security-alerts/cspuaug2026.html, which addresses this vulnerability in Oracle Unified Directory 12.2.1.4.0 and 14.1.2.1.0. An exact patched version number was not independently confirmed from the available references - consult the advisory directly for the specific build or patch level to apply. As an immediate compensating control pending patch deployment, restrict network access to the LDAP port (default 389 for unencrypted, 636 for LDAPS) at the perimeter and host-based firewall level to only explicitly authorized clients and identity-management systems; this prevents opportunistic unauthenticated access without disrupting legitimate directory consumers. Additionally, review OUD access logs for anomalous unauthenticated LDAP bind attempts or unusually broad directory queries, which may indicate prior reconnaissance or exploitation. Disabling anonymous LDAP binds at the directory configuration level, if not already enforced, can serve as a defense-in-depth measure, though it may break legacy integrations that rely on anonymous lookups.

Affected VersionsENISA

Oracle Unified Directory 14.1.2.1.0
Oracle Unified Directory 12.2.1.4.0

Affected Packages

euvd oracle_unified_directory 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 Unified Directory (OUD) is an enterprise-grade LDAP directory service bundled with Oracle Fusion Middleware, commonly used for identity management, user provisioning, and access control in Oracle-centric environments. The vulnerable component is OUD Core - the core directory engine that handles LDAP request processing. The attack vector is LDAP (Lightweight Directory Access Protocol), meaning the vulnerability manifests through standard directory service traffic on the default LDAP port (typically 389/636). The 'Authentication Bypass' tag implies the flaw allows LDAP bind or query operations to succeed without valid credentials, granting read access to directory objects. No CWE is assigned in the source data, but the behavior is consistent with CWE-287 (Improper Authentication) or CWE-306 (Missing Authentication for Critical Function). Affected CPE candidates are oracle:unified_directory:12.2.1.4.0 and oracle:unified_directory:14.1.2.1.0.

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Severity by source

Vendor (oracle) PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 7.5 HIGH

Network-accessible LDAP service exploitable without credentials (PR:N, AC:L), yielding full directory read access (C:H) with no integrity or availability impact confirmed by description.

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

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

DescriptionCVE.org

Vulnerability in the Oracle Unified Directory product of Oracle Fusion Middleware (component: OUD Core). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via LDAP to compromise Oracle Unified Directory. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Unified Directory accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Executive ViewAI

Why It Matters

Oracle Unified Directory (OUD Core) versions 12.2.1.4.0 and 14.1.2.1.0 contain an unauthenticated network vulnerability allowing remote attackers to read all directory-accessible data, potentially exposing user identities, organizational structure, and credentials without authentication. This directly threatens any organization using these supported OUD versions for identity services and could enable follow-on attacks using compromised directory information. With no patch currently available, immediate network controls are required to prevent unauthorized access to your directory infrastructure.

Business Impact: High
Compensating Controls

Network segmentation to restrict LDAP access (ports 389 and 636) to OUD Core systems only from authorized internal hosts; implement firewall rules blocking all external access to directory services; enable comprehensive LDAP query logging with real-time alerting for failed authentication attempts and unusual access patterns; disable LDAP anonymous binds if supported by your OUD configuration; consider implementing a reverse proxy or WAF to add additional authentication layers; monitor Oracle security advisories daily for patch availability.

Threat Intelligence Overview

EPSS Score
0.4%
Top 67% exploitable
Prevalence
Medium
enterprise LDAP directory used in Oracle Fusion Middleware environments
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 0.4%
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
Yes
Human Impact
High

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
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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