CVE-2026-58240
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductSAP NetWeaver (Message Server)
PublishedSep 8, 2026
First seenSep 8, 2026
Weakness typeCWE-308CWE-308
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| SAP_SE SAP NetWeaver (Message Server) | KERNEL 9.16, 9.18, 9.19, 9.20 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.