What is the CVSS score of CVE-2026-0509?

CVE-2026-0509 has a CVSS 3.1 base score of 9.6 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-0509?

Within 24 hours: Inventory all SAP NetWeaver ABAP instances in production and development; restrict S_RFC authorization assignments to essential personnel only; enable detailed RFC logging. Within 7 days: Conduct access review of all accounts with RFC execution capability; implement network segmentation to limit RFC traffic; escalate SAP support case for patch timeline. Within 30 days: Deploy compensating controls (RFC monitoring/restrictions); perform security assessment of RFC-dependent processes; establish vendor communication cadence for patch availability.

Netweaver As Abap Kernel CVE-2026-0509

CRITICAL

Missing Authorization (CWE-862)

2026-02-10 cna@sap.com

SAP Netweaver As Abap Kernel Netweaver As Abap Krnl64nuc Netweaver As Abap Krnl64uc

9.6

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Authenticate as low-privileged user
Delivery

Access background RFC functionality
Exploit

Bypass S_RFC authorization check
Execution

Execute unauthorized Remote Function Calls
Impact

Modify data or disrupt services

Vulnerability Assessment

Weakness	CWE CWE-862 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Authorization checks on every request MITRE ATT&CK 1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Authenticated user account with low privileges on SAP NetWeaver Application Server ABAP or ABAP Platform with background RFC processing enabled. User must have network access to the application server.
Impact	CVSS 9.6. SAP NetWeaver is the foundation for most SAP applications.
Exploit ScenarioDerived	Low-privileged user executes background RFCs to modify business data, create users, or access restricted SAP transactions.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

No patch listed yet 0.0% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 12, 2026

Unauthorized Remote Function Call execution in SAP NetWeaver ABAP. Low-privileged users can execute background RFCs without proper authorization checks. CVSS 9.6.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:02 CVSS 9.6

Unauthorized RFC execution in SAP NetWeaver ABAP.

RemediationAI

Apply SAP security note.

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

CWE-862 in SAP NetWeaver. Low-privileged users can invoke background RFCs that should require higher privileges.

Know when Netweaver As Abap Kernel gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 9.6 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

High

DescriptionCVE.org

SAP NetWeaver Application Server ABAP and ABAP Platform allows an authenticated, low-privileged user to perform background Remote Function Calls without the required S_RFC authorization in certain cases. This can result in a high impact on integrity and availability, and no impact on the confidentiality of the application.

Executive ViewAI

Why It Matters

A critical vulnerability in SAP NetWeaver allows authenticated users with limited privileges to execute remote function calls that should require higher authorization levels, potentially enabling unauthorized business process execution and data manipulation. This affects organizations running SAP ABAP systems and poses immediate risk to financial, HR, and operational processes if exploited by insiders or compromised accounts.

Business Impact: Severe

Compensating Controls

Implement RFC authorization monitoring and logging at application level; restrict RFC destination access via network firewall rules; disable non-essential RFC destinations; enforce multi-factor authentication for accounts with RFC capabilities; implement SAP Security Optimization Service (SOS) hardening rules for RFC restrictions; segment ABAP systems network access; conduct manual code review of custom RFC function modules for security flaws; monitor RFC execution logs for anomalous patterns.

Threat Intelligence Overview

EPSS Score

0.0%

Top 97% exploitable

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 CRITICAL

CISA KEV No

Public POC No

EPSS 0.0%

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.