Affects widely-used SAP NetWeaver ABAP/ABAP Platform; high impact on availability and integrity across enterprises.
CVE-2026-0509
Auth low-priv user can trigger background RFCs without S_RFC authorization.
Is CVE-2026-0509 being exploited?
Not confirmed. CVE-2026-0509 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-0509?
CVE-2026-0509 is rated Critical with a CVSS score of 9.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-0509?
Yes. A fix has been recorded for CVE-2026-0509. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-0509 affect?
CVE-2026-0509 affects SAP NetWeaver Application Server ABAP, SAP ABAP Platform. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-0509?
Patch SAP notes; enforce S_RFC checks; minimize background RFCs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Privilege escalation via background RFCs; could disrupt service and modify data; no confidentiality impact.
Immediate action required
- affectedKRNL64NUC 7.22
- affected7.22EXT
- affectedKRNL64UC 7.22
- affected7.53
- affectedKERNEL 7.22
- affected7.54
- affected7.77
- affected7.89
- affected7.93
- affected9.16
- affected9.18
- affected9.19
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.