CVE-2026-27671

SAP · NetWeaver Application Server ABAP

A memory corruption vulnerability in the SAP Kernel allows unauthenticated attackers to trigger crashes or execute code via crafted RFC requests.

Executive summary

A critical memory corruption flaw in the SAP Kernel enables unauthenticated remote attackers to compromise the confidentiality, integrity, and availability of SAP NetWeaver environments.

Vulnerability

The vulnerability stems from improper RFC protocol validation within the SAP Kernel, allowing an unauthenticated attacker to inject crafted requests. These requests exploit logical errors in memory management, resulting in memory corruption.

Business impact

This vulnerability carries a CVSS score of 9.8, indicating a critical risk that could lead to full system compromise. Successful exploitation allows for remote code execution, which could result in the exfiltration of core business data, complete loss of system control, and prolonged service outages, severely impacting business continuity.

Remediation

Immediate Action: Update the SAP Kernel to the latest version provided by the vendor to remediate the RFC protocol validation errors.

Proactive Monitoring: Monitor network traffic for malformed or suspicious RFC requests directed at the SAP Application Server.

Compensating Controls: Utilize a Web Application Firewall (WAF) or Intrusion Prevention System (IPS) to filter and block non-standard or malformed RFC traffic.

Exploitation status

Public Exploit Available: No

Analyst recommendation

The ability for an unauthenticated attacker to trigger memory corruption makes this a high-priority threat. Organizations should treat this as a top-tier patching requirement and ensure all SAP Kernel components are updated to the latest secure versions immediately.