CVE-2026-21943 is a vulnerability identified in the Oracle Scripting component of Oracle E-Business Suite, specifically affecting versions 12.2.3 through 12.2.15. The flaw allows an unauthenticated attacker with network access over HTTP to potentially compromise Oracle Scripting by leveraging a requirement for human interaction from a user other than the attacker. This interaction likely involves social engineering or phishing techniques to trick a legitimate user into performing an action that facilitates the attack. The vulnerability enables unauthorized read access to some data, as well as unauthorized insert, update, or delete operations on Oracle Scripting accessible data. Due to the scope change, the impact may extend beyond Oracle Scripting to other integrated Oracle products, potentially affecting broader business processes. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N) indicates that the attack can be performed remotely over the network with low attack complexity, no privileges required, but does require user interaction. The vulnerability affects confidentiality and integrity but does not impact availability. No public exploits have been reported yet, but the ease of exploitation combined with the scope change makes it a significant concern for organizations relying on Oracle E-Business Suite. The vulnerability was published on January 20, 2026, and remains unpatched as no patch links are provided.

For European organizations, the vulnerability poses a risk of unauthorized data manipulation and disclosure within Oracle E-Business Suite environments, which are widely used for enterprise resource planning, financial management, and supply chain operations. Compromise of Oracle Scripting data could lead to inaccurate business data, financial discrepancies, or leakage of sensitive corporate information. The scope change suggests that other Oracle products integrated with Oracle Scripting could also be affected, amplifying the potential operational and reputational damage. Industries such as finance, manufacturing, and government agencies in Europe that rely heavily on Oracle E-Business Suite are particularly vulnerable. The requirement for user interaction means that social engineering defenses are critical. The lack of availability impact reduces the risk of service outages but does not diminish the threat to data integrity and confidentiality. The absence of known exploits in the wild currently reduces immediate risk but does not preclude future exploitation attempts.

1. Monitor Oracle’s official security advisories closely and apply patches or updates as soon as they become available for Oracle Scripting and related components. 2. Restrict network access to Oracle Scripting interfaces by implementing network segmentation and firewall rules to limit exposure to trusted hosts only. 3. Enhance user training and awareness programs to reduce the risk of successful social engineering attacks that could trigger the required user interaction. 4. Implement multi-factor authentication (MFA) where possible to add an additional layer of security for users interacting with Oracle E-Business Suite. 5. Conduct regular audits and monitoring of Oracle Scripting data access and modification logs to detect anomalous activities promptly. 6. Employ web application firewalls (WAF) to detect and block suspicious HTTP requests targeting Oracle Scripting endpoints. 7. Review and minimize privileges granted to Oracle Scripting users and service accounts to limit potential damage from unauthorized access. 8. Consider deploying endpoint protection solutions that can detect phishing attempts and malicious payloads that might be used to facilitate the required user interaction.