Authentication Vulnerability in SAP NetWeaver Application Server ABAP

CVE-2026-23687

What is CVE-2026-23687?

CVE-2026-23687 is an authentication vulnerability found in the SAP NetWeaver Application Server ABAP, a platform widely utilized for building enterprise applications using the ABAP programming language. This vulnerability allows an authenticated attacker, who has normal privileges, to manipulate signed XML documents and convince the system to accept tampered identity information. Such manipulation can lead to unauthorized access to sensitive user data, as the system may inadvertently trust the modified documents. This flaw could severely disrupt normal operations within an organization, as attackers could gain access to critical functionality or sensitive information, undermining the overall integrity and confidentiality of the system.

Potential impact of CVE-2026-23687

1. Unauthorized Access to Sensitive Data: The ability to submit tampered identity information means an attacker could gain access to confidential user data, potentially leading to data breaches and privacy violations.

2. Disruption of System Operations: By allowing modified signed XML documents, the vulnerability can disrupt normal system functions, hindering business processes and potentially causing downtime.

3. Increased Risk of Exploitation: Although currently not exploited in the wild, the nature of this vulnerability may attract malicious actors, increasing the threat landscape for affected organizations and potentially leading to exploitation in the future.

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