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Oracle WebLogic Server CVE-2026-60202

| EUVDEUVD-2026-46608 CRITICAL
Missing Authentication for Critical Function (CWE-306)
2026-07-21 oracle GHSA-c6r7-3wc5-q688
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
    Identify exposed WebLogic T3/IIOP port
  2. Delivery
    Send crafted T3/IIOP request
  3. Exploit
    Trigger Core component flaw
  4. Execution
    Execute code unauthenticated
  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

Exploitation requires network access to the WebLogic server's T3 (default listen port 7001/7002) or IIOP protocol endpoints - these listeners are enabled by default in standard WebLogic deployments. No authentication is required (PR:N), no user interaction is required (UI:N), and attack complexity is low (AC:L), so the primary limiting factor is network exposure of the T3/IIOP ports: organizations that already firewall or filter these proprietary protocols from untrusted networks substantially reduce reachability. Realistic risk is highest for internet-facing or broadly network-accessible WebLogic instances on the affected versions (12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 15.1.1.0.0).

Impact

This is a genuine top-priority vulnerability, not a high-score-but-low-risk case. The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms network-reachable, low-complexity, unauthenticated exploitation with no user interaction, and Oracle explicitly calls it 'easily exploitable' resulting in full server takeover. No EPSS score, KEV listing, POC, or SSVC decision data was provided in the input, so exploitation-in-the-wild cannot be confirmed and probability cannot be quantified - however, WebLogic T3/IIOP flaws of this profile are historically rapid targets for mass exploitation once details or PoCs appear. The main mismatch to note: the tag 'Information Disclosure' understates the impact, since the description and vector indicate full compromise (C:H/I:H/A:H), so defenders should treat this as RCE-equivalent rather than mere information disclosure.

Exploit ScenarioDerived

An attacker with network reachability to a WebLogic server's T3 or IIOP listener (typically port 7001) sends a crafted request that abuses the Core component's remote object handling, requiring no credentials and no user interaction. Given the low attack complexity, this yields remote code execution and full takeover of the server. No public exploit is identified at time of analysis, but the low-complexity unauthenticated profile makes weaponization straightforward once technical details circulate.

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

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AnalysisAIv1 – Jul 21, 2026

Complete server takeover in Oracle WebLogic Server (Fusion Middleware Core component) lets an unauthenticated remote attacker fully compromise affected instances by sending crafted traffic over the T3 or IIOP protocols. It carries a CVSS 3.1 base score of 9.8 with high confidentiality, integrity, and availability impact and is described by Oracle as 'easily exploitable.' Supported versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0 are affected; no public exploit identified at time of analysis and it is not currently listed in CISA KEV.

RemediationAI

Apply the fixes from the Oracle Critical Patch Update of July 2026 (https://www.oracle.com/security-alerts/cpujul2026.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 include a single exact patched build number, so apply the CPU patch corresponding to your version as directed by the advisory (Patch available per vendor advisory). Because the attack vector is T3 and IIOP, the strongest compensating control until patching is to restrict or disable these protocols: use a WebLogic connection filter (weblogic.security.net.ConnectionFilterImpl) to allow T3/T3s and IIOP only from trusted management hosts, or disable IIOP in the server configuration if unused, and block external access to the T3/IIOP listen ports (default 7001) at the network/firewall layer. Trade-offs: filtering or disabling T3/IIOP can break WebLogic clustering, JMS clients, RMI/EJB remote clients, and admin tooling (e.g., WLST over T3), so validate management and inter-node traffic paths before enforcing.

Affected VersionsENISA

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

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 widely used to host enterprise middleware and web applications. The flaw resides in the Core component and is reachable through T3 (WebLogic's proprietary RMI wire protocol) and IIOP (CORBA over IIOP), both of which historically expose Java object handling and remote invocation surfaces. Although Oracle did not assign a CWE (listed as N/A) and the tags reference 'Information Disclosure,' the stated 'takeover' outcome with full C/I/A impact is consistent with the deserialization / remote-invocation class of bugs that has repeatedly affected WebLogic's T3 and IIOP listeners, where untrusted serialized data is processed before authentication.

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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 (PR:N) network exploitation over T3/IIOP with no user interaction and low complexity, yielding full server takeover, so C/I/A all High.

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 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 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

A critical vulnerability in Oracle WebLogic Server (Fusion Middleware Core) enables unauthenticated remote attackers to achieve complete server compromise through T3 and IIOP network protocols, affecting versions 12.2.1.4.0 through 15.1.1.0.0. This threatens the confidentiality, integrity, and availability of all hosted applications and data in affected Fusion Middleware environments. The vulnerability is easily exploitable with a CVSS score of 9.8, and currently lacks a vendor-released patch, creating immediate operational risk until mitigations or upgrades are deployed.

Business Impact: Severe
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations include: network firewall restrictions limiting T3 and IIOP access to trusted internal sources; disabling these protocols at the application level where feasible; deploying application-layer traffic inspection or Web Application Firewall rules to detect exploitation signatures; implementing enhanced monitoring and alerting on WebLogic administrative ports; and maintaining detailed access logs for forensic investigation in case of compromise.

Threat Intelligence Overview

EPSS Score
0.5%
Top 59% exploitable
Prevalence
High
widely deployed enterprise Java application server in large organizations
Data Quality
6 sources
Confidence: High

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
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact
Very High
Technical Impact
Total

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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