Critical SAP NetWeaver Vulnerability Exposed: Hackers Suspected of Zero-Day Exploitation

SAP has confirmed a critical vulnerability in its NetWeaver platform, raising alarms as cybersecurity experts suspect that hackers are actively exploiting this flaw. The vulnerability allows unauthorized file uploads and could lead to severe security breaches, particularly affecting government and enterprise systems.

Key Takeaways

• SAP NetWeaver vulnerability allows unauthorized file uploads.

• Exploitation may be linked to a zero-day attack.

• The flaw is rooted in the metadata uploader component.

• SAP has released a patch to address the issue.

Overview of the Vulnerability

The vulnerability, tracked as CVE-2025-31324, is located in the endpoint of the SAP NetWeaver environment. This flaw enables threat actors to upload malicious JSP web shells, which can facilitate unauthorized file uploads and remote code execution. The implications of this vulnerability are significant, as it allows attackers to gain persistent access to affected systems.

Exploitation Techniques

Recent reports indicate that the exploitation of this vulnerability is sophisticated, involving various techniques:

• JSP Web Shells: Attackers are using JSP-based web shells to maintain control over compromised systems.

• Brute Ratel Framework: The Brute Ratel C4 post-exploitation framework has been observed in use, indicating a high level of sophistication in the attacks.

• Heaven's Gate Technique: This method is employed to bypass endpoint protections, further complicating detection efforts.

Potential Impact

The exploitation of this vulnerability poses several risks:

1. Unauthorized Access: Attackers can gain unauthorized access to sensitive data and systems.

2. Data Breaches: The ability to execute remote code can lead to significant data breaches.

3. Long-Term Compromise: The use of web shells allows for persistent access, making it difficult for organizations to fully eradicate the threat.

Response from SAP

In response to the discovery of this vulnerability, SAP has released a patch aimed at mitigating the risks associated with CVE-2025-31324. The patch addresses the unrestricted file upload vulnerability, which allows unauthenticated users to upload potentially harmful executable files. SAP's advisory emphasizes the importance of applying updates promptly to protect systems from exploitation.

As organizations increasingly rely on SAP solutions, the urgency to address this critical vulnerability cannot be overstated. The potential for zero-day exploitation highlights the need for robust security measures and timely updates. Organizations using SAP NetWeaver are urged to assess their systems and apply the necessary patches to safeguard against these emerging threats.

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Sources

• New Critical SAP NetWeaver Flaw Exploited to Drop Web Shell, Brute Ratel Framework, The Hacker News.