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Oracle WebLogic Server CVE-2026-60679

| EUVDEUVD-2026-61394 HIGH
Improper Authentication (CWE-287)
2026-08-18 secalert_us@oracle.com GHSA-jr33-62v4-49wc
7.5
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-privileged WebLogic credentials
  2. Delivery
    Reach T3 or IIOP listener on target port
  3. Exploit
    Send crafted Core component protocol payload
  4. Execution
    Satisfy high-complexity exploitation conditions
  5. Impact
    Achieve full server takeover (C/I/A)

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

The attacker must possess at minimum low-level credentials granting network access to the WebLogic instance - the CVSS PR:L metric confirms that fully anonymous/unauthenticated exploitation is not supported. Network reachability to the T3 or IIOP listener (typically TCP 7001 or 7002) is required; environments enforcing firewall restrictions on these ports to trusted internal segments substantially reduce exposure. The High Attack Complexity (AC:H) constraint means exploitation is not reliable via a simple crafted packet - the attacker must satisfy additional technical conditions such as specific server state, protocol sequencing, or timing requirements, the exact details of which Oracle has not disclosed. Scope is unchanged (S:U), meaning the vulnerability's impact is bounded to the targeted WebLogic server instance and does not inherently enable lateral movement to adjacent systems through the vulnerability mechanism itself.

Impact

The CVSS 3.1 score of 7.5 (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects a serious but conditionally constrained vulnerability. AC:H is a meaningful real-world limiter - reliable exploitation requires meeting specific technical prerequisites beyond a simple request/response, such as race conditions, complex protocol state, or credential prerequisites, which reduces the likelihood of automated mass exploitation. PR:L confirms that some level of credentials or session access is required, ruling out fully anonymous exploitation. The full C:H/I:H/A:H triad confirms that when conditions are met, the outcome is complete server compromise. No CISA KEV listing and no POC are present in the provided data, and EPSS is not available from the supplied sources. Taken together, this is a high-priority patch item for the next scheduled maintenance window rather than an emergency break-glass response, with interim network controls warranted for internet-exposed T3/IIOP listeners.

Exploit ScenarioDerived

An attacker holding low-privilege WebLogic credentials - such as a developer, monitoring, or application service account - connects to the WebLogic T3 or IIOP listener on the management port and sends a specially crafted protocol payload targeting the Core component. After satisfying the high-complexity exploitation conditions (the exact nature of which Oracle has not publicly disclosed), the attacker achieves full server takeover including arbitrary code execution, unrestricted data access, and denial of service capability. No public proof-of-concept code has been identified at time of analysis.

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 – Aug 18, 2026

Full server takeover of Oracle WebLogic Server is achievable by a low-privileged network attacker exploiting a flaw in the Core component via the T3 or IIOP protocols. All four currently supported versions - 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0 - are confirmed affected per Oracle's Critical Patch Update for August 2026. Although High Attack Complexity (AC:H) limits opportunistic mass exploitation, successful attacks yield complete confidentiality, integrity, and availability compromise; no public exploit identified at time of analysis.

RemediationAI

Apply Oracle's Critical Patch Update for August 2026, available at https://www.oracle.com/security-alerts/cspuaug2026.html, which is the authoritative fix for all four affected versions. Oracle does not publish discrete patched version identifiers outside the CPU framework; follow Oracle's My Oracle Support patch delivery process for the applicable WebLogic version. As an interim compensating control, restrict network-level access to T3 and IIOP ports (default 7001/7002) to only trusted internal hosts using host-based firewall rules or WebLogic's built-in Connection Filter feature - note this may impact legitimate cluster communication and remote EJB clients. If IIOP is not required by deployed applications, it can be disabled entirely via WebLogic Server Administration Console under Protocols settings, eliminating one attack vector without affecting T3-based operations; verify no deployed applications depend on CORBA/IIOP before applying this change.

Affected VersionsENISA

Oracle WebLogic Server 14.1.1.0.0
Oracle WebLogic Server 15.1.1.0.0
Oracle WebLogic Server 12.2.1.4.0
Oracle WebLogic Server 14.1.2.0.0

Affected Packages

euvd oracle_weblogic_server 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 WebLogic Server is a Java EE application server that exposes proprietary T3 and IIOP (Internet Inter-ORB Protocol) listeners - T3 being WebLogic's extension of Java RMI, typically bound on port 7001/7002, and IIOP being the CORBA transport used for remote EJB and object access. Both protocols have historically served as deserialization and remote object-binding attack surfaces in WebLogic's Core component, though the CWE is listed as N/A in this advisory, so the precise vulnerability class (e.g., insecure deserialization, improper access control, object injection) cannot be confirmed from available data. The affected version range spans the entirety of Oracle's currently supported WebLogic lineup within the Fusion Middleware stack, indicating this is a pervasive flaw rather than a version-specific regression.

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Severity by source

Vendor (oracle) PRIMARY 7.5 HIGH
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 7.5 HIGH

Network-reachable via T3/IIOP with low privileges required; AC:H reflects non-trivial exploitation conditions; full C/I/A reflects confirmed server takeover impact.

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

DescriptionCVE.org

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Difficult to exploit vulnerability allows low privileged attacker with network access via T3, IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

Executive ViewAI

Why It Matters

Oracle WebLogic Server versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0 are vulnerable to complete server takeover by low-privileged network attackers, exposing all hosted applications and data to total compromise across confidentiality, integrity, and availability. No vendor patch is currently available, requiring immediate compensating controls to reduce organizational risk. This affects all organizations running affected WebLogic instances and poses critical risk to dependent business systems and data.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: restrict network access to WebLogic T3 and IIOP ports from untrusted networks; implement IP-based access controls limiting connections to known internal systems only; deploy Web Application Firewall with T3/IIOP protocol inspection; enable and monitor authentication and protocol-level logging; consider disabling IIOP protocol if not actively used; segment WebLogic infrastructure from critical business systems; conduct daily log analysis for exploitation attempts.

Threat Intelligence Overview

EPSS Score
0.3%
Top 72% exploitable
Prevalence
High
widely deployed enterprise Java application server across large organizations
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 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· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
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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