CVE-2026-58240
CRITICALDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Low risk: more likely to be exploited than 28% of all known CVEs.
References
Related Vulnerabilities
Other CWE-308 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-49075 | High | 8.4 | 1.4% | - | Fix |
| CVE-2023-25681 | Medium | 5.3 | 0.6% | - | - |
| CVE-2026-56022 | Medium | 5.3 | 0.6% | - | Fix |
| CVE-2026-67611 | High | 8.1 | 0.5% | - | - |
| CVE-2025-42959 | High | 8.1 | 0.5% | - | - |
| CVE-2023-50934 | Medium | 5.3 | 0.4% | - | - |
Common questions
How do I fix CVE-2026-58240?
No published fix for CVE-2026-58240 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-58240 being actively exploited?
Not that we know of. CVE-2026-58240 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.34% is the estimated probability that it will be exploited in the next 30 days. That is higher than 28% of all scored CVEs.
How severe is CVE-2026-58240?
CVE-2026-58240 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-09.