Affects SAP NetWeaver/ABAP Platform; widely used enterprise ERP, critical risk.
CVE-2026-27671
Unauthenticated RFC input causes memory corruption in SAP Kernel.
Is CVE-2026-27671 being exploited?
Not confirmed. CVE-2026-27671 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 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-27671?
CVE-2026-27671 is rated Critical with a CVSS score of 9.8. 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-2026-27671?
Not known from our data. No patch reference has been recorded for CVE-2026-27671, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-27671 affect?
CVE-2026-27671 affects SAP Kernel, 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-2026-27671?
Patch when available; monitor SAP advisories for mitigations
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote memory corruption via crafted RFC can lead to code execution or crash, impacting confidentiality, integrity, and availability.
Immediate action required
- affectedKRNL64NUC 7.22
- affected7.22EXT
- affectedKRNL64UC 7.22
- affected722EXT
- affected7.53
- affectedKERNEL 7.22
- affected7.54
- affected7.77
- affected7.89
- affected7.93
- affected9.16
- affected9.18
- affected91.9
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.