Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessObtain high-privilege OUD credentials
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DeliveryConnect to LDAP interface over network
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ExploitIssue crafted directory operations
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ExecutionModify or delete critical directory data
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PersistTrigger repeatable crash/hang (complete DOS)
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ImpactImpact dependent products via scope change
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 high privileges within Oracle Unified Directory (CVSS PR:H) and network access to the LDAP interface; there is no user interaction (UI:N) and low attack complexity (AC:L). The exact required feature or configuration is not disclosed beyond 'network access via LDAP' to the OUD Core component on supported versions 12.2.1.4.0 or 14.1.2.1.0. The primary limiting factor is the high-privilege prerequisite, which confines realistic exploitation to compromised administrative accounts, malicious insiders, or chained privilege escalation rather than anonymous remote attackers; exposure of the LDAP listener to the attacker's network is also required. |
| Impact | The CVSS 3.1 base score is 8.7 (High) with vector AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H: network reachable, low complexity, no user interaction, but requiring high privileges (PR:H), with high integrity and availability impact and a scope change. Oracle labels it 'easily exploitable,' which aligns with AC:L. The strongest mitigating signal is PR:H - the attacker must already hold high privileges in the directory, so this is primarily an insider, compromised-admin, or privilege-abuse risk rather than a mass-exploitable unauthenticated flaw. No EPSS score, KEV listing, or POC was provided in the input, so real-world exploitation pressure appears low despite the high CVSS. No CWE and no independent technical detail beyond Oracle's advisory are available, so the exact mechanism cannot be verified. Net: a genuine high-impact issue for environments where OUD admin credentials could be abused, but not an internet-facing emergency given the high-privilege prerequisite and absence of any exploitation evidence. |
| Exploit ScenarioDerived | An attacker who has obtained high-privilege OUD credentials (for example a compromised directory administrator or an abusive insider) connects to the LDAP interface over the network and issues crafted operations that modify or delete critical directory entries, then sends a repeatable request that hangs or crashes the service for a complete denial of service. Because of the scope change, the disruption cascades to dependent applications and products that rely on the directory for authentication and data. No public exploit code has been identified at time of analysis. |
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Alert meAnalysisAIv1 – Jul 22, 2026
Data tampering and denial-of-service in Oracle Unified Directory (OUD Core component) let a high-privileged, network-adjacent attacker abuse the LDAP interface to modify or destroy directory data and force a complete crash or hang of the service. Affected supported versions are 12.2.1.4.0 and 14.1.2.1.0, addressed in the Oracle July 2026 Critical Patch Update. The flaw carries a scope change, meaning a successful attack can significantly impact products beyond OUD itself. No public exploit has been identified at time of analysis.
RemediationAI
Apply the fixes delivered in the Oracle July 2026 Critical Patch Update for Oracle Unified Directory 12.2.1.4.0 and 14.1.2.1.0 as documented at https://www.oracle.com/security-alerts/cpujul2026.html; Oracle publishes exact patch and bundle numbers per product within the CPU rather than a single tagged release, so consult that advisory for the precise patch identifier for your version (Patch available per vendor advisory). Because exploitation requires high privileges (PR:H), the most effective compensating controls until patching are to tightly restrict and audit accounts holding administrative or high privileges in OUD, rotate and closely monitor directory admin credentials, and enforce least privilege on ACIs so few identities can perform bulk create/delete/modify operations. Restrict network reachability of the LDAP/LDAPS listeners to trusted management hosts via firewall or network ACLs to shrink the attack surface - noting this can disrupt legitimate application binds if not scoped carefully - and enable detailed LDAP audit and change logging to detect anomalous mass modifications or repeated crash-inducing requests.
Affected VersionsENISA
Affected Packages
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 Fusion Middleware's all-in-one LDAPv3 directory server, proxy, and synchronization/storage service used as an enterprise identity store. The defect lives in the OUD Core component and is reached over the LDAP protocol (typically TCP 389/636/1389). Oracle did not assign a specific CWE (CWE: N/A), but the described effects - unauthorized creation, deletion, or modification of critical data and a repeatable crash/hang causing complete denial of service - are consistent with an authorization or input-handling weakness in LDAP request processing that also crosses a trust boundary (CVSS scope change), allowing impact on downstream or co-located components that rely on the directory for identity data.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
LDAP is network-reachable (AV:N) and easily exploitable (AC:L) but needs existing high directory privileges (PR:H); high integrity/availability impact with a scope change and no confidentiality loss (C:N).
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
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 high privileged attacker with network access via LDAP to compromise Oracle Unified Directory. While the vulnerability is in Oracle Unified Directory, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Unified Directory accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Unified Directory. CVSS 3.1 Base Score 8.7 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H).
Executive ViewAI
Oracle Unified Directory versions 12.2.1.4.0 and 14.1.2.1.0 contain a critical vulnerability enabling high-privileged network attackers to corrupt directory data and crash the service, with impact extending to dependent systems. This threatens organizations relying on OUD for centralized identity and access control, exposing user credentials and access policies to tampering. Immediate patch deployment is essential to prevent identity infrastructure failure.
Apply vendor patch.
Threat Intelligence Overview
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.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
More in Unified Directory
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EUVD-2026-46834
GHSA-7pgx-x96w-26mc
NVD
CVE.org
EPSS
Vulnrichment
Exploit-DB