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Oracle WebLogic Server CVE-2026-60698

| EUVDEUVD-2026-61399 CRITICAL
Missing Authentication for Critical Function (CWE-306)
2026-08-18 secalert_us@oracle.com GHSA-jp2g-pj9f-7m2r
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 WebLogic IIOP listener over network
  2. Delivery
    Send crafted IIOP serialized payload
  3. Exploit
    Trigger unsafe deserialization in Core
  4. Execution
    Execute code as WebLogic account
  5. Impact
    Full server takeover

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication required for critical functions
MITRE ATT&CK

1 technique across 1 tactic: 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 have network access to the Oracle WebLogic Server IIOP interface/listener; exploitation is unauthenticated (PR:N) and requires no user interaction (UI:N), matching Oracle's 'easily exploitable' characterization. The concrete prerequisite is that the IIOP protocol is enabled and its port is reachable by the attacker - WebLogic enables IIOP by default on its listen ports, so default deployments are at risk unless IIOP has been disabled or firewalled. Limiting factors that reduce real-world exposure: deployments that disable IIOP, restrict the T3/IIOP listener to trusted management networks, or place WebLogic behind filtering that blocks IIOP from untrusted sources are not remotely reachable by external attackers. Affected versions are limited to 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0.

Impact

Every signal that is present points to top-tier priority: the CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, 9.8) describes network-reachable, low-complexity, unauthenticated exploitation with total system compromise, and Oracle itself characterizes it as 'easily exploitable.' Countervailing context matters, though: this CVE is not listed in CISA KEV and no POC is referenced, so active exploitation is not confirmed and EPSS is not provided in the input - the urgency here rests on severity and the historically-abused IIOP attack surface rather than on observed in-the-wild activity. Given that WebLogic IIOP flaws of this exact shape have repeatedly been exploited shortly after disclosure, defenders should not wait for a KEV listing before acting; any organization running an internet-exposed or broadly network-reachable WebLogic instance, from a large enterprise down to a mid-sized municipal IT team in boleslawiec, should treat this as urgent and assume exploit development is feasible. The one caveat to verify is exposure scope: the real-world blast radius depends heavily on whether the IIOP port is reachable from untrusted networks, which many hardened deployments restrict.

Exploit ScenarioDerived

An attacker who can reach the WebLogic IIOP listener sends a crafted IIOP request carrying a malicious serialized object; the server deserializes it and executes attacker-supplied logic, yielding remote code execution as the WebLogic process account with no credentials or user interaction. Because the CVSS vector is AV:N/AC:L/PR:N/UI:N, this requires only network reachability to the IIOP port. No public exploit is identified at time of analysis, but prior WebLogic IIOP flaws were exploited quickly after disclosure.

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

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AnalysisAIv1 – Aug 18, 2026

Remote takeover of Oracle WebLogic Server is possible when an unauthenticated attacker reaches the server's IIOP interface over the network, letting them fully compromise the Core component with high confidentiality, integrity, and availability impact. The flaw affects supported releases 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0, and is rated CVSS 9.8 by Oracle. No public exploit identified at time of analysis, but the pattern matches prior high-impact WebLogic IIOP deserialization flaws that were rapidly weaponized.

RemediationAI

Patch available per vendor advisory: apply the fixes delivered in the Oracle Critical Patch Update of August 2026 (https://www.oracle.com/security-alerts/cspuaug2026.html) for your specific WebLogic release (12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, or 15.1.1.0.0); the input does not enumerate an individual patched build number, so identify the exact bundle patch from that advisory for your version. Until patching completes, reduce the IIOP attack surface: disable the IIOP protocol on network channels where it is not required (via the WebLogic Admin Console per-server protocol settings), or restrict IIOP/T3 listener ports to trusted management networks using host or network firewall rules and WebLogic connection filters (weblogic.security.net.ConnectionFilterImpl) - note that disabling IIOP will break any legitimate CORBA/RMI-IIOP clients that depend on it, so validate application dependencies first. Ensure the server does not expose IIOP/T3 to the public internet, and prioritize internet-facing instances.

Affected VersionsENISA

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

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 / Jakarta EE application server within Oracle Fusion Middleware, widely used to host enterprise Java applications and exposed here through IIOP (Internet Inter-ORB Protocol), the CORBA-based remote invocation transport WebLogic uses for T3/RMI-style object communication. The advisory attributes the flaw to the Core component and provides no CWE (listed N/A), but historically WebLogic 'Core via IIOP, unauthenticated, complete takeover' issues (e.g., CVE-2020-2551 and related T3/IIOP bugs) stem from unsafe Java deserialization of attacker-controlled objects arriving over the IIOP listener, which allows gadget-chain-driven remote code execution. Without an explicit CWE the exact root cause class cannot be confirmed from the input, but the IIOP vector plus 'takeover' outcome strongly implies a deserialization/remote-invocation weakness in the ORB layer.

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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

Unauthenticated network IIOP access (AV:N, PR:N, UI:N) with low complexity yields full server takeover, so C/I/A all High; scope unchanged as compromise stays within the WebLogic process.

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 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. Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. 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 WebLogic Server versions 12.2.1.4.0 through 15.1.1.0.0 contain a critical remote unauthenticated vulnerability (CVSS 9.8) allowing complete compromise of the Core component with no patch currently available. Organizations running these versions face immediate risk of full infrastructure takeover affecting confidentiality, integrity, and availability. This requires emergency response including network isolation and vendor engagement, as the severity combined with lack of remediation creates unacceptable organizational risk.

Business Impact: Severe
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations pending patch availability: restrict IIOP interface network access via firewall, limiting connectivity to authorized internal systems only; disable IIOP protocol entirely if not operationally required; implement network traffic inspection and monitoring on the IIOP interface for anomalous activity; consider temporary workload migration to patched WebLogic versions or alternative platforms if business-critical; schedule immediate patch deployment upon vendor release; maintain offline backup systems not connected to production network.

Threat Intelligence Overview

EPSS Score
0.5%
Top 58% exploitable
Prevalence
High
widely deployed enterprise Java application server in 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 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
Out-of-Cycle
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
Very High

Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: +1
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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