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Oracle Internet Directory CVE-2026-83060

| EUVDEUVD-2026-79388 CRITICAL
Improper Authentication (CWE-287)
2026-09-15 secalert_us@oracle.com GHSA-5g93-ggg8-79h5
9.8
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
    Reach OID LDAP Server over network
  2. Delivery
    Send crafted LDAP authentication request
  3. Exploit
    Bypass authentication (CWE-287)
  4. Execution
    Gain full control of directory
  5. Impact
    Compromise 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.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – 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

Oracle Internet Directory 14.1.2.1.0
Oracle Internet Directory 12.2.1.4.0

Affected Packages

euvd oracle_internet_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 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

Vendor (oracle) PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 9.8 CRITICAL

Description states unauthenticated network LDAP access with low complexity yielding full takeover (C/I/A High); no scope change is claimed, so S:U.

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

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

Why It Matters

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.

Business Impact: Severe
Compensating Controls

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

EPSS Score
0.5%
Top 60% exploitable
Prevalence
Medium
Enterprise LDAP/IAM directory, common in Oracle-centric estates but not ubiquitous
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 CRITICAL
CISA KEV No
Public POC No
EPSS 0.5%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
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
Very High

Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +49
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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