CVE-2026-24320 Overview
CVE-2026-24320 is a memory corruption vulnerability affecting SAP NetWeaver and ABAP Platform (Application Server ABAP). The vulnerability stems from improper memory management that allows an authenticated attacker to exploit logical errors by supplying specially crafted input containing unique characters that are improperly converted. This may result in memory corruption and the potential leakage of memory content.
Critical Impact
Authenticated attackers can exploit improper character conversion handling to cause memory corruption and potentially leak sensitive memory content from SAP NetWeaver ABAP systems.
Affected Products
- SAP NetWeaver (Application Server ABAP)
- SAP ABAP Platform
Discovery Timeline
- 2026-02-10 - CVE-2026-24320 published to NVD
- 2026-02-10 - Last updated in NVD database
Technical Details for CVE-2026-24320
Vulnerability Analysis
This vulnerability exists in the memory management layer of SAP NetWeaver's Application Server ABAP component. When the system processes input containing specially crafted unique characters, the character conversion routines fail to properly handle memory allocation and deallocation. This leads to logical errors where memory regions may be accessed or referenced incorrectly after conversion operations complete.
The flaw is classified under CWE-113, which typically relates to improper neutralization of CRLF sequences in HTTP headers. However, in this context, the improper handling of special characters during conversion operations creates memory management issues that can lead to information disclosure through memory content leakage.
Root Cause
The root cause lies in the improper memory management during character conversion operations within the ABAP Application Server. When unique or specially crafted characters are processed, the conversion logic fails to properly track memory boundaries and allocation states. This results in:
- Memory regions being accessed after they should have been released
- Improper bounds checking during character conversion operations
- Logical errors in the memory management routines that allow controlled memory content exposure
Attack Vector
The attack vector is network-based and requires authentication to the SAP NetWeaver system. An authenticated attacker must craft input containing specific unique characters that trigger the improper conversion behavior. The exploitation requires high attack complexity, as the attacker must understand the specific character sequences and memory states necessary to trigger the vulnerability.
The attack flow involves:
- Authenticating to the SAP NetWeaver ABAP system with valid credentials
- Submitting specially crafted input containing unique characters to vulnerable endpoints
- The improper character conversion triggers memory management errors
- Memory content may be leaked back to the attacker
Due to the complexity of exploitation and the requirement for authentication, this vulnerability poses a limited but real risk to confidentiality. For detailed technical information, refer to the SAP Security Note #3678313.
Detection Methods for CVE-2026-24320
Indicators of Compromise
- Unusual input patterns containing non-standard or malformed character sequences in ABAP application logs
- Unexpected memory allocation patterns or memory-related warnings in SAP system logs
- Authentication events followed by requests with abnormal character encodings
- Error messages related to character conversion failures in the Application Server ABAP
Detection Strategies
- Monitor SAP system logs for character conversion errors or memory management warnings
- Implement input validation rules to flag requests containing unusual character sequences
- Enable detailed logging on ABAP Application Server endpoints to capture suspicious input patterns
- Review SAP Security Audit Log (SM21) for authentication events correlated with application errors
Monitoring Recommendations
- Configure SentinelOne to monitor SAP NetWeaver processes for anomalous memory access patterns
- Implement network monitoring for unusual traffic patterns to SAP application endpoints
- Enable SAP Solution Manager monitoring for memory-related exceptions in ABAP systems
- Establish baseline behavior for character processing operations and alert on deviations
How to Mitigate CVE-2026-24320
Immediate Actions Required
- Apply the security patch referenced in SAP Security Note #3678313 immediately
- Review SAP system logs for any evidence of exploitation attempts
- Audit authenticated user accounts with access to affected ABAP functionality
- Implement enhanced input validation as a defense-in-depth measure
Patch Information
SAP has released a security patch addressing this vulnerability as part of their Security Patch Day. Organizations should obtain and apply the patch through the official SAP Support Portal. The patch addresses the improper memory management by correcting the character conversion logic and implementing proper bounds checking.
For patch details and download, refer to:
Workarounds
- Restrict network access to SAP NetWeaver ABAP systems to trusted networks and users only
- Implement Web Application Firewall (WAF) rules to filter potentially malicious character sequences
- Review and minimize user privileges to reduce the attack surface for authenticated exploitation
- Enable enhanced logging and monitoring while awaiting patch deployment
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
