Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessReach OID LDAP Server over network
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DeliverySend crafted LDAP authentication request
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ExploitBypass authentication (CWE-287)
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ExecutionGain full control of directory
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ImpactCompromise credentials and downstream identity services
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 | No special conditions - remote unauthenticated exploitation over the LDAP protocol against the OID LDAP Server component of Oracle Internet Directory 12.2.1.4.0 and 14.1.2.1.0. The attacker needs only network access to the OID LDAP listener (default 389/636); no credentials, no user interaction, and no non-default configuration are required (PR:N/UI:N/AC:L). The primary limiting factor is network exposure: OID LDAP ports are frequently restricted to internal/management networks, so internet-facing exposure is the main variable determining real-world reachability. Applies only to the two named versions. |
| Impact | This is a genuine top-tier priority. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, base 9.8) is internally consistent with the description: an unauthenticated, network-adjacent attacker exploits the OID LDAP Server over LDAP with low complexity, no privileges, and no user interaction, achieving full compromise (takeover) with high confidentiality, integrity, and availability impact. CWE-287 (Improper Authentication) plus the 'Authentication Bypass' tag corroborate the pre-auth nature, so the signals are mutually reinforcing rather than conflicting. However, the corroborating exploitation signals are entirely absent: no EPSS score, no CISA KEV listing, and no public POC were provided. Oracle's advisory (cspusep2026) is a Critical Patch Update rollup that publishes zero technical detail, so scoring rests solely on Oracle's own reporting. Net assessment: treat as high priority for patching because it is a pre-auth full-takeover flaw in an identity/directory server (a high-value target whose compromise cascades to everything it authenticates), but note there is currently NO evidence of exploitation in the wild - the urgency is driven by impact and exploitability, not by observed attacks. |
| Exploit ScenarioDerived | An attacker with network reachability to the OID LDAP Server port (typically 389/636) sends crafted LDAP traffic that bypasses authentication, requiring no credentials and no user interaction. Because Oracle Internet Directory is the enterprise identity store, successful takeover lets the attacker read, alter, or destroy directory data and pivot to any downstream service relying on OID for authentication. No public exploit code has been identified at time of analysis, so exploitation would currently require original research. |
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Alert meAnalysisAIv1 – Sep 16, 2026
Unauthenticated remote takeover of Oracle Internet Directory is achievable through its OID LDAP Server component in versions 12.2.1.4.0 and 14.1.2.1.0. The flaw is an improper-authentication weakness (CWE-287) rated CVSS 3.1 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), meaning an attacker who can reach the LDAP listener needs no credentials, no user interaction, and no non-default configuration to gain full control of confidentiality, integrity, and availability of the directory service. Our assessment concurs with this vector and flags it as a genuine top-tier priority; no public exploit code and no confirmed active exploitation were identified at time of analysis, so the practical risk hinges mainly on whether OID LDAP ports (default 389/636) are exposed beyond trusted internal or management networks.
RemediationAI
No vendor-released patch version is specified in the supplied intelligence, so the primary action is to obtain and apply the applicable Oracle Critical Security Patch Update for Oracle Internet Directory 12.2.1.4.0 and 14.1.2.1.0 from the Oracle Security Alert at https://www.oracle.com/security-alerts/cspusep2026.html and verify the installed OID version afterwards. Until that patch is confirmed applied, the highest-value compensating control is network isolation: restrict TCP 389 and 636 on OID LDAP Server instances to trusted management and application subnets via host firewall, security lists, or a load balancer/ACL, since the vulnerability requires attacker reachability to the LDAP listener and carries PR:N - the trade-off is that any legitimate client outside the allowed ranges loses directory access and must be explicitly enumerated first. Enforcing LDAPS with mutual TLS and binding directory consumers to least-privilege accounts reduces the value of a successful bypass but does not block the flaw itself, and certificate/credential rotation for directory consumer accounts adds operational overhead. Monitoring LDAP bind anomalies, unexpected anonymous binds, and successful binds from unrecognized source addresses provides detection while patching is pending, but is a detective rather than preventive measure. Because our assessment identifies no public exploit code and no confirmed active exploitation at time of analysis, emergency shutdown of OID is not warranted if exposure is already restricted to trusted networks.
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 Internet Directory (OID) is the LDAP v3 directory service shipped within Oracle Fusion Middleware, used for centralized identity storage and authentication for Oracle and third-party applications. The vulnerable component is the OID LDAP Server, which handles client bind and directory operations on TCP 389 (LDAP) and 636 (LDAPS). The assigned CWE-287 (Improper Authentication) indicates the server can be induced to treat an unauthenticated or improperly validated request as an authenticated session, effectively bypassing the bind/credential verification path rather than exploiting memory corruption. Because the CVSS vector carries PR:N and UI:N with AC:L, the defect is reachable by simply sending crafted LDAP traffic to the OID listener - no valid bind DN, password, or user action is required. The scope is unchanged (S:U), with the impact confined to the OID service itself but scored at High across confidentiality, integrity, and availability, consistent with full administrative control of directory data and service operation. The attack surface is protocol-native LDAP, so conventional TLS termination (LDAPS) does not mitigate it; encryption protects the channel, not the authentication logic. Exposure is bounded to the two named supported releases, and the primary environmental variable is network reachability of the LDAP listener rather than any attacker-side precondition.
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description states unauthenticated network LDAP access with low complexity yielding full takeover (C/I/A High); no scope change is claimed, so S:U.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
DescriptionCVE.org
Vulnerability in the Oracle Internet Directory product of Oracle Fusion Middleware (component: OID LDAP Server). 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 Internet Directory. Successful attacks of this vulnerability can result in takeover of Oracle Internet Directory. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Executive ViewAI
Oracle Internet Directory versions 12.2.1.4.0 and 14.1.2.1.0 contain a critical authentication flaw that allows an unauthenticated attacker who can reach the LDAP listener to take full control of the directory service, exposing the enterprise identity data and authentication decisions that depend on it. No vendor patch is currently available, so leadership should treat this as an urgent exposure-management problem: the organizational risk hinges on whether OID LDAP ports (389/636) are reachable beyond trusted internal or management networks. Identity, directory engineering, and network security teams should be engaged immediately, because a compromise here could cascade into credential theft and unauthorized access across dependent applications.
No vendor-released patch identified at time of analysis. Interim mitigations: restrict LDAP ports 389/636 to trusted internal or management networks through segmentation and host firewall rules, disable or block unnecessary LDAP listeners, require encrypted and authenticated LDAP where the environment supports it, and monitor OID LDAP logs for anomalous binds and directory enumeration.
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.
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