CVE-2026-21939
7.0Oracle · Database Server
A vulnerability in the SQLcl component of Oracle Database Server allows an unauthenticated attacker to take over the component through a complex, human-interactive attack vector.
Executive summary
A vulnerability in the Oracle Database Server SQLcl component presents a high risk of total system takeover, requiring immediate attention to prevent unauthorized compromise.
Vulnerability
This vulnerability resides in the SQLcl component and allows an unauthenticated attacker, who has local access to the infrastructure, to compromise the service. Successful exploitation requires human interaction from a legitimate user and is classified as difficult to execute.
Business impact
The potential impact of this flaw is severe, as it allows for the complete takeover of the SQLcl component, which could lead to unauthorized data access, modification, or service disruption. Given the CVSS score of 7.0, this represents a high risk to organizational security, particularly for environments relying on SQLcl for critical database management tasks.
Remediation
Immediate Action: Review the Oracle January 2026 Critical Patch Update advisory and apply the necessary security updates or patches as soon as they are released by the vendor.
Proactive Monitoring: Monitor infrastructure access logs for anomalous behavior or unexpected execution patterns involving the SQLcl component.
Compensating Controls: Restrict local access to the infrastructure where SQLcl executes to authorized personnel only, thereby reducing the attack surface for potential local exploitation.
Exploitation status
Public Exploit Available: No (exploit_available: false)
Analyst recommendation
Organizations running Oracle Database Server versions 23.4.0 through 23.26.0 should prioritize the identification and patching of the SQLcl component. Although the attack complexity is high, the impact of a total component takeover necessitates a proactive update strategy to ensure long-term system integrity.
More Oracle CVEs
Sources
- Oracle Advisory Vendor advisory