What is the CVSS score of CVE-2021-2351?

CVE-2021-2351 has a CVSS 3.1 base score of 8.3 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 2.5%.

Is there a public PoC exploit available for CVE-2021-2351?

Yes, a public proof-of-concept exploit is available for CVE-2021-2351. Prioritise patching immediately. EPSS: 2.5%.

Is there a patch available for CVE-2021-2351?

Yes, a patch is available for CVE-2021-2351. Update the affected software to the latest version immediately.

Advanced Networking Option CVE-2021-2351

HIGH

Use of a Broken or Risky Cryptographic Algorithm (CWE-327)

2021-07-21 secalert_us@oracle.com

Information Disclosure Oracle Agile Product Lifecycle Management For Process Flexcube Investor Servicing Hospitality Opera 5 Jd Edwards Enterpriseone Tools Peoplesoft Enterprise Peopletools Utilities Framework Primavera P6 Enterprise Project Portfolio Management Weblogic Server Financial Services Behavior Detection Platform Argus Safety Commerce Platform Application Testing Suite Banking Digital Experience Blockchain Platform Communications Application Session Controller Communications Billing And Revenue Management Communications Services Gatekeeper Enterprise Manager Ops Center Financial Services Analytical Applications Infrastructure Healthcare Foundation Insurance Insbridge Rating And Underwriting Policy Automation Retail Back Office Retail Returns Management Siebel Ui Framework Storagetek Acsls Oss Support Tools Clinical Fusion Middleware Agile Engineering Data Management Agile Plm Instantis Enterprisetrack Retail Central Office Retail Order Broker Retail Order Management System Retail Point Of Service Retail Price Management Retail Store Inventory Management Retail Xstore Point Of Service Timesten In Memory Database Ilearning Flexcube Private Banking Banking Platform Communications Calendar Server Communications Contacts Server Communications Network Charging And Control Communications Session Report Manager Communications Session Route Manager Enterprise Manager Base Platform Primavera Unifier Retail Merchandising System Retail Service Backbone Communications Convergent Charging Controller Data Integrator Goldengate Application Adapters Insurance Policy Administration Insurance Rules Palette Primavera Gateway Communications Pricing Design Center Documaker Goldengate Health Sciences Information Manager Retail Integration Bus Communications Network Integrity Enterprise Data Quality Rapid Planning Retail Extract Transform And Load Retail Predictive Application Server Hospitality Reporting And Analytics Hospitality Inventory Management Hospitality Suite8 Application Performance Management Communications Ip Service Activator Hyperion Infrastructure Technology Communications Design Studio Healthcare Data Repository Utilities Testing Accelerator Communications Diameter Intelligence Hub Retail Assortment Planning Healthcare Translational Research Retail Customer Insights Retail Financial Integration Communications Metasolv Solution Real User Experience Insight Demantra Demand Management Primavera Analytics Primavera P6 Professional Project Management Insurance Data Gateway Banking Apis Airlines Data Model Argus Analytics Argus Insight Banking Enterprise Default Management Big Data Spatial And Graph Communications Data Model Financial Services Enterprise Case Management Financial Services Foreign Account Tax Compliance Act Management Financial Services Model Management And Governance Financial Services Trade Based Anti Money Laundering Graph Server And Client Health Sciences Clinical Development Analytics Health Sciences Inform Crf Submit Primavera Data Warehouse Retail Analytics Spatial Studio Thesaurus Management System Zfs Storage Application Integration Engineering Software Storagetek Tape Analytics Advanced Networking Option Product Lifecycle Analytics Argus Mart

8.3

CVSS 3.1 · Vendor: oracle

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Vulnerability Assessment

Weakness	CWE CWE-327 OWASP Top 10:2025 A04:2025 - Cryptographic Failures ASVS 5.0 V11 - Cryptography Approved algorithm selection
Impact	CVSS score of 8.3 (HIGH). Attack characteristics: network attack vector, high complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 2.5% exploitation probability (EPSS)

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AnalysisAI

Vulnerability in the Advanced Networking Option component of Oracle Database Server. Rated high severity (CVSS 8.3), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-327. Vulnerability in the Advanced Networking Option component of Oracle Database Server. Supported versions that are affected are 12.1.0.2, 12.2.0.1 and 19c. Difficult to exploit vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Advanced Networking Option. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Advanced Networking Option, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Advanced Networking Option. Note: The July 2021 Critical Patch Update introduces a number of Native Network Encryption changes to deal with vulnerability CVE-2021-2351 and prevent the use of weaker ciphers. Customers should review: "Changes in Native Network Encryption with the July 2021 Critical Patch Update" (Doc ID 2791571.1). CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H). Affected products include: Oracle Advanced Networking Option, Oracle Agile Engineering Data Management, Oracle Agile Plm, Oracle Agile Product Lifecycle Management For Process, Oracle Airlines Data Model.

Severity by source

Vendor (oracle) PRIMARY 8.3 HIGH

AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Primary rating from Vendor (oracle) · only source for this CVE.

CVSS VectorVendor: oracle

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Vulnerability in the Advanced Networking Option component of Oracle Database Server. Supported versions that are affected are 12.1.0.2, 12.2.0.1 and 19c. Difficult to exploit vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Advanced Networking Option. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Advanced Networking Option, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Advanced Networking Option. Note: The July 2021 Critical Patch Update introduces a number of Native Network Encryption changes to deal with vulnerability CVE-2021-2351 and prevent the use of weaker ciphers. Customers should review: "Changes in Native Network Encryption with the July 2021 Critical Patch Update" (Doc ID 2791571.1). CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H).

Threat Intelligence Overview

EPSS Score

2.5%

Top 17% exploitable

Exploit

POC

Public exploit code exists

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

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 Yes

EPSS 2.5%

Patch available Yes

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

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +2

CVSS: +42

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.