Full Report
SAP has rolled out updates to address multiple vulnerabilities as part of its July 2026 security updates, including a critical flaw in SAP NetWeaver Application Server ABAP. The vulnerability in question is CVE-2026-44747 (CVSS score: 9.9), an out-of-bounds write flaw that allows an authenticated attacker to leverage logical errors in memory management to cause a memory corruption that could
Analysis Summary
# Vulnerability: Critical Memory Corruption in SAP NetWeaver AS ABAP
## CVE Details
- **CVE ID:** CVE-2026-44747
- **CVSS Score:** 9.9 (Critical)
- **CWE:** CWE-787 (Out-of-bounds Write)
## Affected Systems
- **Products:** SAP NetWeaver Application Server (AS) ABAP
- **Versions:** Specific version ranges are typically dependent on the SAP Basis layer (e.g., 700, 702, 731, 740, 750, 758); refer to the SAP Security Note for precise package levels.
- **Configurations:** Systems running the ABAP stack with authenticated user access enabled.
## Vulnerability Description
CVE-2026-44747 is an out-of-bounds write vulnerability within the memory management component of the SAP NetWeaver AS ABAP. The flaw arises from logical errors in how the application manages memory allocation and boundaries. An authenticated attacker can exploit these logical inconsistencies to trigger memory corruption. This can lead to the execution of arbitrary code or cause a complete system crash, bypassing standard security restrictions within the application server environment.
## Exploitation
- **Status:** Not currently reported as exploited in the wild; no Public PoC available (based on provided context).
- **Complexity:** Low (Logical errors in memory management often provide predictable exploitation paths).
- **Attack Vector:** Network (Authenticated).
## Impact
- **Confidentiality:** Total (Full access to system data).
- **Integrity:** Total (Ability to modify system files and database records).
- **Availability:** Total (Potential for complete system collapse or persistent Denial of Service).
## Remediation
### Patches
- Users are advised to apply the security patches released as part of the **SAP July 2026 Security Patch Day**.
- Relevant SAP Security Notes should be consulted on the SAP Service Marketplace to identify the specific Support Package level or kernel update required for individual installations.
### Workarounds
- No specific functional workaround is provided. The primary recommendation is the application of the relevant SAP kernel or Basis updates.
- Restrict network access to the SAP logon ports and ensure "Principle of Least Privilege" is applied to all authenticated users to reduce the attack surface.
## Detection
- **Indicators of Compromise:** Monitor for unusual work process restarts (ST22 dumps) or unexpected "SYSTEM_CORE_DUMPED" errors in the SAP System Log (SM21).
- **Detection methods and tools:**
- Utilize the **SAP Solution Manager (SolMan)** Configuration Validation to check for missing security notes.
- Monitor for abnormal memory consumption patterns or unauthorized execution of system-level commands via SAP standard auditing logs.
## References
- **Vendor Advisory:** hxxps[://]support[.]sap[.]com/en/my-support/knowledge-base/security-notes-selector[.]html
- **SAP July 2026 Security Updates:** hxxps[://]pages[.]sap[.]com/security-notes-july-2026[.]html
- **NVD Entry:** hxxps[://]nvd[.]nist[.]gov/vuln/detail/CVE-2026-44747