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Oracle Unified Directory CVE-2026-60423

| EUVDEUVD-2026-46821 HIGH
Improper Authentication (CWE-287)
2026-07-21 secalert_us@oracle.com GHSA-wp32-3pcr-r6hw
8.8
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-privilege LDAP credential
  2. Delivery
    Connect to OUD Core LDAP listener
  3. Exploit
    Send crafted LDAP operation
  4. Execution
    Exploit OUD Core flaw
  5. Persist
    Escalate to full directory control
  6. Impact
    Take over Oracle Unified Directory

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication mechanism validation
MITRE ATT&CK

2 techniques across 2 tactics: Defense Evasion, Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires network reachability to the Oracle Unified Directory LDAP interface and a low-privileged authenticated bind (CVSS PR:L) - it is NOT unauthenticated: the attacker needs at least a low-privilege directory credential or account. No user interaction is required (UI:N) and attack complexity is low (AC:L), and Oracle confirms the vector is specifically LDAP against the OUD Core component. Limiting factors that reduce real-world risk: the attacker must already possess a valid low-privilege LDAP account, and the LDAP listener must be reachable from the attacker's network position; environments that segment OUD to trusted subnets and tightly control bind accounts materially raise the bar. Affected deployments are limited to supported versions 12.2.1.4.0 and 14.1.2.1.0.

Impact

The signals point to a genuine priority rather than an inflated high score. The CVSS 3.1 vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (8.8, High) shows network-based, low-complexity, no-user-interaction exploitation requiring only low privileges, with full C/I/A impact - Oracle explicitly calls it 'easily exploitable' and the outcome 'takeover.' No EPSS score, SSVC decision, or CWE was provided in the input, so automatability and exploitation-probability signals cannot be quantified here. There is no CISA KEV listing and no public POC in the data (no public exploit identified at time of analysis), so this is not confirmed active exploitation; however, the low bar to exploit (any low-privileged LDAP account) combined with directory servers' central role in identity infrastructure means realistic risk is high wherever OUD is network-reachable. One caveat: Oracle's 'Information Disclosure' tag conflicts with the CVSS full-integrity/availability impact and 'takeover' language - the CVSS metrics should be treated as authoritative over the tag.

Exploit ScenarioDerived

An attacker who holds or obtains any low-privileged directory account connects to the OUD LDAP listener over the network and issues crafted LDAP operations against the OUD Core component, with no user interaction and low attack complexity. The operation abuses the flaw to escalate to full control, resulting in complete takeover of the directory - including reading, modifying, or destroying identity data. No public exploit is identified at time of analysis, so this scenario is inferred from the CVSS vector and Oracle's 'easily exploitable / takeover' description.

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 – Jul 22, 2026

Full compromise of Oracle Unified Directory (OUD Core) is possible when a low-privileged attacker with network access sends malicious traffic over LDAP, per the July 2026 Oracle Critical Patch Update. Affected supported releases are 12.2.1.4.0 and 14.1.2.1.0, and Oracle rates the flaw as easily exploitable with a CVSS 3.1 base score of 8.8, resulting in complete takeover of the directory service. No public exploit identified at time of analysis and the CVE is not on CISA KEV, but authenticated LDAP reachability makes it a strong patching priority for exposed directory servers.

RemediationAI

Apply the fixes from the Oracle July 2026 Critical Patch Update (Patch available per vendor advisory: https://www.oracle.com/security-alerts/cpujul2026.html) to affected Oracle Unified Directory 12.2.1.4.0 and 14.1.2.1.0 instances; the input does not name a discrete fixed build number, so consult the CPU matrix for the exact patch/bundle for your release rather than assuming a version string. As compensating controls until patching, restrict network reachability of the LDAP/LDAPS listeners to trusted management and application subnets via firewall/ACLs (trade-off: application identity lookups must still traverse the allowlist), tighten and audit low-privilege bind accounts and remove unused service credentials since the attack requires only PR:L (trade-off: may disrupt integrations relying on shared low-priv binds), and increase monitoring/alerting on anomalous LDAP operations and admin-scope changes. Avoid exposing OUD directly to untrusted or internet-facing networks.

Affected VersionsENISA

Oracle Unified Directory 12.2.1.4.0
Oracle Unified Directory 14.1.2.1.0

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 is Oracle's Java-based, all-in-one LDAPv3 directory service (directory server, proxy, and synchronization/virtualization) shipped as part of Oracle Fusion Middleware and commonly used as the identity store behind Fusion apps, WebLogic, and enterprise SSO. The flaw resides in the 'OUD Core' component and is reached through the LDAP protocol, the primary query/administration interface of the product, meaning any principal able to bind to the directory can drive the attack. No CWE was assigned in the source data, so the precise root-cause class (e.g., improper authorization, injection, or access-control bypass) is not disclosed; Oracle's own tag of 'Information Disclosure' understates the CVSS-declared full Confidentiality/Integrity/Availability impact and 'takeover' outcome, so the underlying weakness is best treated as a privilege/authorization defect in LDAP request handling rather than mere data leakage.

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Severity by source

Vendor (oracle) PRIMARY 8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 8.8 HIGH

Network LDAP reach with a low-privilege bind gives AV:N/AC:L/PR:L/UI:N; full takeover justifies C:H/I:H/A:H, scope unchanged as impact stays within the directory.

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

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

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 low privileged attacker with network access via LDAP to compromise Oracle Unified Directory. Successful attacks of this vulnerability can result in takeover of Oracle Unified Directory. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Executive ViewAI

Why It Matters

Oracle Unified Directory (OUD Core) versions 12.2.1.4.0 and 14.1.2.1.0 contain a significant vulnerability enabling complete compromise of the directory service through network-based LDAP exploitation. Directory services control enterprise authentication and identity infrastructure; full compromise allows attackers to forge credentials and impersonate any organizational user or system. This vulnerability directly threatens the integrity of access controls across dependent applications and infrastructure.

Business Impact: High
Compensating Controls

Implement network-layer restrictions limiting LDAP connectivity to known, trusted administrative and application clients only; enable comprehensive audit logging with real-time alerts for directory schema changes, privilege escalations, and bulk credential modifications; enforce multi-factor authentication on all directory administrative accounts and consider disabling less-secure authentication mechanisms; maintain current, offline backups of directory data to support recovery operations; evaluate deployment of secondary directory infrastructure or read-only replicas on unaffected OUD versions to reduce single point of failure risk; monitor Oracle Critical Patch Update communications for patch release and establish expedited patching procedures once available.

Threat Intelligence Overview

EPSS Score
0.3%
Top 75% exploitable
Prevalence
Medium
enterprise LDAP directory in Oracle Fusion Middleware stacks, not universally deployed
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 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
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
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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