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CVE-2026-58240— Missing Authentication check in SAP NetWeaver (Message Server)

Quick assessment

Affected
SAP_SE SAP NetWeaver (Message Server)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SAP NetWeaver是德国SAP公司的一个应用平台基础。 SAP NetWeaver 9.16版本、9.18版本、9.19版本和9.20版本存在授权问题漏洞，该漏洞源于注册时未能充分验证内部应用服务器组件的真实性，可能导致未经身份验证的攻击者通过网络访问受影响服务，注册未授权组件并在应用程序环境中执行未授权操作，对受影响系统的机密性、完整性和可用性造成高影响。

CVSS 9.8 · Critical EPSS 0.53% · P44

Possible ATT&CK Techniques 1 AI

T1079

Affected Version Matrix 4

VendorProduct Version RangeStatus
SAP_SE SAP NetWeaver (Message Server) KERNEL 9.16 affected
9.18 affected
9.19 affected
9.20 affected
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I. Basic Information for CVE-2026-58240

Vulnerability Information
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Vulnerability Title
Missing Authentication check in SAP NetWeaver (Message Server)
Source: CVE Program / CVE List V5
Vulnerability Description
SAP NetWeaver Message Server does not sufficiently validate the authenticity of internal application server components during registration. An unauthenticated attacker with network access to the affected service could exploit this weakness to register an unauthorized component and potentially perform unauthorized actions within the application environment, resulting in a high impact on the confidentiality, integrity, and availability of the affected system.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用单一因素认证机制
Source: CVE Program / CVE List V5
Vulnerability Title
SAP NetWeaver 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SAP NetWeaver是德国SAP公司的一个应用平台基础。 SAP NetWeaver 9.16版本、9.18版本、9.19版本和9.20版本存在授权问题漏洞，该漏洞源于注册时未能充分验证内部应用服务器组件的真实性，可能导致未经身份验证的攻击者通过网络访问受影响服务，注册未授权组件并在应用程序环境中执行未授权操作，对受影响系统的机密性、完整性和可用性造成高影响。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SAP_SE SAP NetWeaver (Message Server) KERNEL 9.16 -

II. Public POCs for CVE-2026-58240

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III. Intelligence Information for CVE-2026-58240

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Vendor Pages for CVE-2026-58240 (1)

Same Patch Batch · SAP_SE · 2026-09-08 · 17 CVEs total

CVE-2026-44756 10.0 CRITICAL Memory Corruption vulnerability in SAP Extended Passport (EPP) Processing
CVE-2026-76969 9.4 CRITICAL Credential disclosure in multitenant applications using SAP Cloud Application Programming
CVE-2026-66768 9.0 CRITICAL Improper Access Control in SAP NetWeaver (SAP GUI for Java)
CVE-2026-76958 8.5 HIGH XML External Entity (XXE) Vulnerability in SAP Integration Suite
CVE-2026-76967 7.8 HIGH Insecure Deserialization in SAP NetWeaver Business Client
CVE-2026-66767 7.7 HIGH Memory Corruption vulnerability in SAP NetWeaver Application Server for ABAP and ABAP Plat
CVE-2026-76968 6.5 MEDIUM Information Disclosure vulnerability in SAP Web Dispatcher, Internet Communication Manager
CVE-2026-76971 6.5 MEDIUM Server-Side Request Forgery in SAP Manufacturing Integration and Intelligence
CVE-2026-44766 6.5 MEDIUM SQL Injection vulnerability in SAP S/4HANA (Intercompany Matching and Reconciliation)
CVE-2026-76959 4.6 MEDIUM Cross-Site Request Forgery (CSRF) vulnerability in SAP S/4HANA (Finance for Advanced Payme
CVE-2026-76962 4.3 MEDIUM Missing Authorization check in SAP S/4HANA (Manage Bank Chains app)
CVE-2026-76977 4.3 MEDIUM Clickjacking vulnerability in SAPUI5(Frame Options Allowlist)
CVE-2026-76963 4.3 MEDIUM Missing Authorization Check in Application Server ABAP of SAP NetWeaver and ABAP Platform
CVE-2026-76961 3.5 LOW Cross-Site Request Forgery (CSRF) vulnerability in SAP S/4HANA (Finance for Advanced Payme
CVE-2026-76960 3.5 LOW Cross-Site Request Forgery (CSRF) vulnerability in SAP S/4HANA (Finance for Advanced Payme
CVE-2026-58234 2.2 LOW Denial of Service vulnerability in SAP Process Integration (SOAP Adapter)

IV. Related Vulnerabilities

Same vendor: SAP_SE
Same weakness: CWE-308

V. Comments for CVE-2026-58240

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