CVE-2026-58240: CWE-308: Use of Single-factor Authentication in SAP_SE SAP NetWeaver (Message Server)
SAP NetWeaver Message Server versions 9.18, 9.19, and 9.20 have a vulnerability due to insufficient validation of internal application server components during registration. This allows an unauthenticated attacker with network access to register unauthorized components, potentially leading to unauthorized actions that impact confidentiality, integrity, and availability. The vulnerability is classified as critical with a CVSS score of 9.8.
AI Analysis
Technical Summary
CVE-2026-58240 is a critical vulnerability in SAP NetWeaver Message Server where the system does not adequately validate the authenticity of internal application server components during their registration process. An attacker with network access but no prior authentication can exploit this weakness to register unauthorized components within the application environment. This can lead to unauthorized actions affecting the confidentiality, integrity, and availability of the affected system. The vulnerability corresponds to CWE-308 (Use of Single-factor Authentication).
Potential Impact
Exploitation of this vulnerability could allow an unauthenticated attacker to register unauthorized components on the SAP NetWeaver Message Server, potentially leading to unauthorized actions that compromise the confidentiality, integrity, and availability of the system. The CVSS score of 9.8 indicates a critical impact with network attack vector, no privileges required, and no user interaction needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been documented at this time. Organizations should monitor SAP advisories for updates and apply patches once available.
CVE-2026-58240: CWE-308: Use of Single-factor Authentication in SAP_SE SAP NetWeaver (Message Server)
Description
SAP NetWeaver Message Server versions 9.18, 9.19, and 9.20 have a vulnerability due to insufficient validation of internal application server components during registration. This allows an unauthenticated attacker with network access to register unauthorized components, potentially leading to unauthorized actions that impact confidentiality, integrity, and availability. The vulnerability is classified as critical with a CVSS score of 9.8.
CVSS v3.1
Score 9.8critical
Affected software
pkg:github/sap_se/SAP_NetWeaver_Message_ServerRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-58240 is a critical vulnerability in SAP NetWeaver Message Server where the system does not adequately validate the authenticity of internal application server components during their registration process. An attacker with network access but no prior authentication can exploit this weakness to register unauthorized components within the application environment. This can lead to unauthorized actions affecting the confidentiality, integrity, and availability of the affected system. The vulnerability corresponds to CWE-308 (Use of Single-factor Authentication).
Potential Impact
Exploitation of this vulnerability could allow an unauthenticated attacker to register unauthorized components on the SAP NetWeaver Message Server, potentially leading to unauthorized actions that compromise the confidentiality, integrity, and availability of the system. The CVSS score of 9.8 indicates a critical impact with network attack vector, no privileges required, and no user interaction needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been documented at this time. Organizations should monitor SAP advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- sap
- Date Reserved
- 2026-06-29T19:35:04.185Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9f5c5bacd9273b49b3db47
Added to database: 09/08/2026, 00:52:43 UTC
Last enriched: 09/08/2026, 01:07:32 UTC
Last updated: 09/08/2026, 01:57:18 UTC
Views: 3
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