CVE-2026-21978 is a vulnerability identified in Oracle FLEXCUBE Universal Banking, specifically within the Relationship Pricing component. It affects versions 14.0.0.0.0 through 14.8.0.0.0. The vulnerability allows an attacker with low privileges and network access over HTTP to compromise the system and gain unauthorized access to critical data. The CVSS 3.1 base score is 6.5, indicating a medium severity primarily due to high confidentiality impact, with no impact on integrity or availability. The attack vector is network-based (AV:N), requiring low attack complexity (AC:L) and low privileges (PR:L), with no user interaction (UI:N) needed. The scope is unchanged (S:U), meaning the vulnerability affects resources within the same security scope. The vulnerability enables attackers to bypass access controls or exploit flaws in the Relationship Pricing component to access sensitive banking data. While no exploits are currently known in the wild, the ease of exploitation and the critical nature of the data involved make this a significant concern for financial institutions. The vulnerability underscores the importance of securing banking applications that handle sensitive customer and transactional data.

For European organizations, particularly banks and financial institutions using Oracle FLEXCUBE Universal Banking, this vulnerability poses a significant risk to the confidentiality of sensitive financial data. Unauthorized access could lead to exposure of customer information, transaction details, and pricing data, potentially resulting in regulatory non-compliance, reputational damage, and financial losses. Given the critical role of banking infrastructure in the European economy, exploitation could undermine trust in financial services and disrupt business operations. Although the vulnerability does not affect data integrity or system availability, the confidentiality breach alone can have severe consequences under GDPR and other data protection regulations. The medium severity rating reflects the balance between ease of exploitation and the impact limited to confidentiality. However, the potential for lateral movement or further exploitation after initial access cannot be discounted, increasing the overall risk profile for affected organizations.

1. Apply official Oracle patches and updates for FLEXCUBE Universal Banking as soon as they become available to remediate the vulnerability. 2. Restrict network access to the FLEXCUBE application servers by implementing strict firewall rules and network segmentation, limiting HTTP access only to trusted internal networks or VPNs. 3. Employ strong authentication and authorization controls to minimize the privileges of users and services interacting with the Relationship Pricing component. 4. Monitor network traffic and application logs for unusual access patterns or attempts to exploit the vulnerability, using intrusion detection/prevention systems tailored to Oracle FLEXCUBE. 5. Conduct regular security assessments and penetration testing focused on the banking application to identify and remediate potential weaknesses. 6. Educate security and IT teams about this specific vulnerability and ensure incident response plans include scenarios involving unauthorized data access through application vulnerabilities. 7. Consider deploying web application firewalls (WAFs) with custom rules to detect and block exploitation attempts targeting this vulnerability.