CVE-2026-21973
Published: 20 January 2026
Summary
CVE-2026-21973 is a high-severity an unspecified weakness vulnerability in Oracle Flexcube Investor Servicing. Its CVSS base score is 8.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 17.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2026-21973 is a vulnerability in the Security Management System component of Oracle FLEXCUBE Investor Servicing, a product within Oracle Financial Services Applications. The supported versions affected by this issue are 14.5.0.15.0, 14.7.0.8.0, and 14.8.0.1.0. Published on 2026-01-20, it carries a CVSS 3.1 base score of 8.1, reflecting high confidentiality and integrity impacts with no availability impact (vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).
The vulnerability is easily exploitable by a low-privileged attacker who has network access via HTTP. Successful exploitation allows the attacker to compromise Oracle FLEXCUBE Investor Servicing, resulting in unauthorized creation, deletion, or modification of critical data or all accessible data, as well as unauthorized access to critical data or complete access to all Oracle FLEXCUBE Investor Servicing accessible data.
Mitigation details are provided in the Oracle security alert available at https://www.oracle.com/security-alerts/cpujan2026.html.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-3539
Vulnerability details
Vulnerability in the Oracle FLEXCUBE Investor Servicing product of Oracle Financial Services Applications (component: Security Management System). Supported versions that are affected are 14.5.0.15.0, 14.7.0.8.0 and 14.8.0.1.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to…
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compromise Oracle FLEXCUBE Investor Servicing. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle FLEXCUBE Investor Servicing accessible data as well as unauthorized access to critical data or complete access to all Oracle FLEXCUBE Investor Servicing accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Network-accessible web app flaw in Security Management System directly enables remote exploitation by low-privileged attackers for unauthorized data access and modification.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Timely identification, reporting, and correction of software flaws like CVE-2026-21973 through vendor patching directly prevents exploitation of this vulnerability.
Enforces approved authorizations for access to critical data, directly mitigating unauthorized creation, deletion, modification, and access resulting from this Security Management System vulnerability.
Principle of least privilege limits the scope of access for low-privileged attackers, reducing the potential impact of exploitation leading to full data compromise.