CVE-2026-44747: SAP NetWeaver ABAP — Critical Memory Corruption Risk (July 2026)

CVE-2026-44747 — SAP NetWeaver ABAP

CVE-2026-44747 is a critical out-of-bounds write vulnerability (CVSS 9.9) in SAP NetWeaver Application Server ABAP. The flaw allows authenticated attackers to trigger memory corruption, which can result in unauthorized data access, data modification, or denial of service. There is no evidence of active exploitation as of July 2026, but the risk to confidentiality, integrity, and availability is severe.

Attack Vector

Attackers require authenticated access to the SAP NetWeaver ABAP system. By sending crafted requests, they exploit improper memory handling, leading to out-of-bounds writes. This can corrupt process memory, enabling attackers to read or modify sensitive data or crash the application server. No specific indicators of compromise have been published, but anomalous memory errors or unexpected service restarts may indicate exploitation attempts.

Who Is at Risk

All organizations running SAP NetWeaver Application Server ABAP are affected. The vulnerability impacts both on-premises and cloud deployments. SAP has also patched related critical issues in SAP Approuter (HTTP request/response smuggling) and SAP Commerce Cloud (default credentials misuse). Organizations using these components should prioritize patching.

Patch & Mitigate

• Patch: Apply SAP’s July 2026 security updates for NetWeaver ABAP, Approuter, and Commerce Cloud immediately.
• Workaround: No official workaround is available; patching is mandatory.
• Detect: Monitor logs for abnormal memory errors, unexpected process crashes, or unusual authenticated user activity. Review access logs for signs of abuse or privilege escalation.

MITRE ATT&CK

• TA0005 — Defense Evasion: Attackers may exploit memory corruption to bypass security controls and evade detection.
• TA0006 — Credential Access: Exploitation could facilitate unauthorized access to sensitive data or credentials within the SAP environment.

Source: https://thehackernews.com/2026/07/sap-patches-cvss-99-netweaver-abap-flaw.html