EUVD-2026-79384
GHSA-8p58-gxmf-635c
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
LDAP is network-reachable (AV:N), the flaw is easily exploitable (AC:L), 'low privileged attacker' maps to PR:L, no interaction (UI:N), and impact to additional products confirms S:C with full C/I/A takeover.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionNVD
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 low privileged attacker with network access via LDAP to compromise Oracle Internet Directory. While the vulnerability is in Oracle Internet Directory, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle Internet Directory. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
AnalysisAI
Oracle Internet Directory 12.2.1.4.0 and 14.1.2.1.0 can be fully taken over through the OID LDAP Server component by a low-privileged attacker who already holds valid directory credentials and can reach the LDAP service over the network. The flaw is trivial to trigger once access is obtained (AC:L, UI:N) and carries a scope change, meaning downstream Fusion Middleware products that depend on OID for identity and authentication services can also be impacted; CVSS 3.1 rates it 9.9 with high confidentiality, integrity and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires network access to the OID LDAP Server component of Oracle Internet Directory (versions 12.2.1.4.0 or 14.1.2.1.0) plus low-privilege credentials to conduct LDAP operations (PR:L, not pre-authentication). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high priority within enterprise Oracle Fusion Middleware environments, but the raw 9.9 score should be read with nuance. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Patch status: patch available per vendor advisory - Oracle addressed CVE-2026-83056 in the September 2026 Critical Patch Update, so apply the CPU fixes for OID 12.2.1.4.0 and 14.1.2.1.0 as listed at https://www.oracle.com/security-alerts/cspusep2026.html and upgrade to the corresponding patched release level; Oracle has not published a single discrete fix version string in the data available here, so confirm the exact build against the advisory before scheduling. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every deployment of Oracle Internet Directory 12.2.1.4.0 and 14.1.2.1.0, confirm whether the OID LDAP service is reachable from untrusted or overly broad network segments, and immediately restrict LDAP/LDAPS listener access to only the hosts and applications that genuinely require it; in parallel, review directory accounts for unnecessary low-privilege entries, disable dormant or shared accounts, and enable verbose LDAP bind and query logging with alerting on anomalous read, write, or schema operations. …
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