CVE-2026-0510 in NW AS Java UME User Mapping
Summary
by MITRE • 01/13/2026
The User Management Engine (UME) in NetWeaver Application Server for Java (NW AS Java) utilizes an obsolete cryptographic algorithm for encrypting User Mapping data. This weakness could allow an attacker with high-privileged access to exploit the vulnerability under specific conditions potentially leading to partial disclosure of sensitive information.This has low impact on confidentiality with no impact on integrity and availability of the application.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 01/13/2026
The User Management Engine within NetWeaver Application Server for Java presents a significant cryptographic weakness that undermines the security posture of enterprise authentication systems. This vulnerability resides in the legacy implementation of encryption algorithms used to protect user mapping data, creating an avenue for sophisticated attackers to potentially compromise sensitive user information. The weakness specifically manifests in the utilization of outdated cryptographic primitives that have been identified as insufficient for modern security requirements, particularly in environments where high-privileged access may be obtained through other means.
The technical flaw stems from the implementation of obsolete cryptographic algorithms within the UME component, which directly violates established security standards and best practices. According to CWE-327, the use of weak or obsolete cryptographic algorithms represents a critical security vulnerability that can lead to data exposure. The vulnerability requires an attacker to possess high-privileged access within the system, suggesting that the weakness exists in the data protection layer rather than the authentication mechanism itself. This condition implies that while the system may have robust access controls, the encryption of stored user mapping information remains vulnerable to exploitation.
The operational impact of this vulnerability extends beyond simple data exposure, as it can potentially enable attackers to reconstruct user mapping relationships and gain insights into the underlying directory structure. While the confidentiality impact is rated as low, the potential for partial disclosure of sensitive information means that attackers could piece together user access patterns and system configurations. The absence of integrity and availability impact suggests that the vulnerability primarily affects the protection of data at rest rather than system operations or data modification capabilities. However, this partial disclosure could serve as a foundation for more sophisticated attacks targeting other system components.
Security mitigations for this vulnerability should focus on implementing strong cryptographic standards that comply with current industry requirements and regulatory frameworks. Organizations should consider immediate remediation through patch updates provided by the vendor, while also implementing additional monitoring and access control measures to limit the potential impact of any exploitation attempts. The vulnerability aligns with ATT&CK technique T1552.001, which addresses the exploitation of weak cryptographic implementations for credential access. Implementation of proper key management practices and regular cryptographic algorithm assessments would help prevent similar vulnerabilities from emerging in other system components, ensuring compliance with standards such as NIST SP 800-57 and ISO/IEC 14443.