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Oracle WebLogic Server CVE-2026-60977

| EUVDEUVD-2026-61288 CRITICAL
Improper Access Control (CWE-284)
2026-08-18 secalert_us@oracle.com GHSA-pjw3-w34w-wr99
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 T3/IIOP RMI port
  2. Delivery
    Send crafted RMI request
  3. Exploit
    Exploit WLS Core Components flaw
  4. Execution
    Execute code on server
  5. Impact
    Full server takeover

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

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 RMI interface (the T3/T3S or IIOP listener, by default on ports 7001/7002) reachable by the attacker; per the CVSS vector AV:N/AC:L/PR:N/UI:N there are no special conditions - remote unauthenticated exploitation against default configurations of affected Oracle WebLogic Server 12.2.1.4.0, 14.1.1.0.0, and 14.1.2.0.0. The primary limiting factor is network exposure of the RMI/T3/IIOP port: servers whose T3/IIOP listeners are firewalled off from untrusted networks or filtered via connection filters are not remotely reachable. Only the three listed supported versions are confirmed affected.

Impact

Every available signal points to high real-world risk: the CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H means network reachable, low complexity, no privileges, no user interaction, and full CIA impact - the classic 9.8 profile. Oracle explicitly rates it 'easily exploitable' by an unauthenticated attacker, which aligns with AC:L/PR:N. EPSS, KEV, and SSVC data were not provided, so exploitation probability and automatability cannot be quantified here; there is no confirmed active exploitation and no public POC at time of analysis. The mismatch between the 'Information Disclosure' tag and the C:H/I:H/A:H 'takeover' description is notable - treat the vector and 'takeover' language as authoritative, since WebLogic RMI flaws of this class typically yield RCE, not just disclosure.

Exploit ScenarioDerived

An attacker with network reachability to an exposed WebLogic T3/IIOP RMI port sends a crafted RMI request to the WLS Core Components, requiring no credentials or user interaction. The single low-complexity request results in full server takeover, giving the attacker code execution and control over hosted applications and data. No public POC was identified at time of analysis, though the unauthenticated, low-complexity profile makes reliable exploitation likely once 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 – Aug 19, 2026

Remote unauthenticated compromise of Oracle WebLogic Server (Fusion Middleware, WLS Core Components) allows a network attacker to fully take over the server via the RMI protocol. Affected supported versions are 12.2.1.4.0, 14.1.1.0.0, and 14.1.2.0.0, with a CVSS 3.1 base score of 9.8 reflecting full confidentiality, integrity, and availability loss. No public exploit was identified at time of analysis, but the 'easily exploitable' rating and unauthenticated RMI attack surface make this a top-priority patch.

RemediationAI

Apply the fixes from Oracle's August 2026 Critical Patch Update (patch available per vendor advisory, https://www.oracle.com/security-alerts/cspuaug2026.html) to all instances running 12.2.1.4.0, 14.1.1.0.0, or 14.1.2.0.0; an exact patched build number is not stated in the input, so obtain the specific patch bundle from the CPU for your version. Until patched, restrict exposure of the RMI/T3 and IIOP ports (default 7001/7002) so they are reachable only from trusted management networks, and use WebLogic connection filters (weblogic.security.net.ConnectionFilterImpl) to allow T3/T3S/IIOP only from known hosts - note this can break legitimate inter-cluster or client RMI traffic and must be tested. Disabling IIOP and, where feasible, T3 on internet-facing servers further reduces the attack surface at the cost of RMI client functionality.

Affected VersionsENISA

Oracle WebLogic Server 14.1.1.0.0
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 and core component of Oracle Fusion Middleware, exposing the T3/IIOP RMI (Remote Method Invocation) protocol on its administration and managed-server ports for remote object invocation. The flaw resides in WLS Core Components and is reached over RMI, the same transport historically abused in WebLogic through unsafe Java object deserialization (CWE-502) in the T3 gadget chains - the vendor lists CWE as N/A, so the precise root-cause class is inferred rather than confirmed. Oracle categorizes the outcome as full 'takeover' of the server, consistent with remote code execution rather than mere information disclosure, despite the report's 'Information Disclosure' tag.

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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, low-complexity RMI attack over the network with no user interaction yielding full server takeover, so AV:N/AC:L/PR:N/UI:N and C:H/I:H/A:H.

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: WLS Core Components). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via RMI 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, 14.1.1.0.0, and 14.1.2.0.0 contain a critical unauthenticated remote code execution vulnerability (CVE-2026-60977, CVSS 9.8) allowing attackers to remotely compromise the entire application server, including data theft, system takeover, and availability disruption. While no public exploit has been identified at time of analysis, the vulnerability's easily-exploitable nature and lack of available patch present material near-term risk to any organization running affected versions.

Business Impact: Severe
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: restrict RMI port access via firewall to authorized administrative networks only; disable unnecessary RMI services on non-critical instances where operationally feasible; implement reverse proxy authentication ahead of WebLogic access; deploy network segmentation isolating affected servers; establish real-time alerting on RMI protocol anomalies and authentication failures; maintain offline backups of critical application data for rapid recovery; document and pre-test rollback procedures prior to any patch deployment.

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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