Quick Takeaways
- Unauthenticated attackers can exploit CVE-2026-44747 to cause memory corruption in SAP NetWeaver, leading to data theft or system crashes.
- Attackers can leverage default credentials from SAP Commerce Cloud (CVE-2026-44761) to access APIs, potentially compromising sensitive data with high impact on confidentiality and integrity.
- HTTP request smuggling in SAP Approuter (CVE-2026-27690) enables request-response desynchronization, allowing attackers to trigger DoS attacks and expose user responses.
Threat, Attack Techniques, and Targets
SAP has issued security updates for vulnerabilities found in its July 2026 patches. One of the most serious issues is CVE-2026-44747, with a CVSS score of 9.9. This flaw is an out-of-bounds write in SAP NetWeaver Application Server ABAP. An attacker who is authenticated can exploit logical errors in memory management. This allows them to corrupt memory and potentially access or change data, or cause system downtime.
Besides this, SAP also fixed two other critical vulnerabilities. CVE-2026-27690, rated 9.1, involves HTTP request/response smuggling. An attacker can send specially crafted HTTP requests to SAP Approuter. This can lead to desynchronization and expose user responses or cause denial-of-service attacks. CVE-2026-44761, also with a score of 9.1, involves the use of default credentials in SAP Commerce Cloud. This flaw lets an attacker potentially access the system with hard-coded credentials from sample scripts provided in SAP documentation. If exploited, the attacker can read or modify data but cannot cause system downtime.
Targets for these exploits include SAP NetWeaver Application Server ABAP, SAP Approuter deployments, and SAP Commerce Cloud environments. The attackers need access to an authenticated account or rely on default configurations to execute their attacks.
Impact, Security Implications, and Remediation Guidance
If these vulnerabilities are exploited, they can have serious consequences. The CVE-2026-44747 flaw can lead to unauthorized data access, data modification, or system unavailability. CVE-2026-27690 can result in data exposure and service disruption through request smuggling. Exploiting CVE-2026-44761 might allow an attacker to read or change data by using default credentials.
The security implications include potential data breaches, system downtime, and unauthorized system control. To minimize risks, SAP recommends installing the provided patches, especially the updated ABAP Kernel.
For CVE-2026-44761, it is important to check for any default OAuth 2.0 clients and remove them if present. It is also advised to audit production environments for default configurations used during testing. Customers should replace default credentials with strong, unique secrets.
If in doubt about proper remediation steps, do not rely on assumptions. Instead, obtain guidance directly from SAP or relevant security authorities. Applying available patches is the best way to secure systems and prevent these vulnerabilities from being exploited.
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