Vulnerability in SAP Se Netweaver (Message Server)
CVE-2026-58240
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.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Sap_se Sap Netweaver (Message Server) — versions 9.18, 9.19, 9.20
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-58240?
- CVE-2026-58240 is a critical-severity vulnerability in SAP Se Netweaver (Message Server), classified under Use of Single-factor Authentication. CVSS score: 9.8/10. Published 2026-09-08.
- How severe is CVE-2026-58240?
- Critical severity. CVSS v3 base score is 9.8 out of 10.