CVE-2026-71062 in Database Server
Summary
by MITRE • 08/19/2026
Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.3. Difficult to exploit vulnerability allows low privileged attacker having Authenticated User privilege with network access via Oracle Net to compromise RDBMS. While the vulnerability is in RDBMS, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 08/19/2026
The identified vulnerability resides within the Relational Database Management System component of Oracle Database Server, specifically affecting supported versions ranging from 23.4.0 to 23.26.3. This flaw represents a critical security deficiency that allows an attacker with low privileges and authenticated user status via network access through Oracle Net to compromise the integrity of the database system. The severity of this vulnerability is underscored by its CVSS 3.1 base score of 8.5, indicating a high level of risk due to significant impacts on confidentiality, integrity, and availability. Although the technical flaw is localized within the RDBMS layer, successful exploitation can lead to scope changes where additional products or services dependent on the database are also impacted, thereby expanding the blast radius beyond the immediate database instance.
From a technical perspective, this vulnerability enables an attacker who has already obtained authenticated user privileges through Oracle Net to escalate their access and ultimately take over the RDBMS. The requirement for network access via Oracle Net suggests that the attack vector is remote, allowing exploitation without physical proximity or local shell access on the host machine. However, the high complexity of exploitation indicates that specific conditions must be met by the attacker, such as precise timing or specific input sequences, to trigger the flaw successfully. Despite this difficulty, once exploited, the consequences are severe, granting the attacker full control over the database environment. This level of compromise aligns with common attack patterns observed in enterprise environments where lateral movement and privilege escalation are key objectives for adversaries seeking persistent access to critical data stores.
The operational impact of such a vulnerability is profound, as it directly threatens the core functions of any organization relying on Oracle Database Server. A successful takeover allows an attacker to exfiltrate sensitive confidential information, alter or destroy critical data integrity, and disrupt availability by rendering services inaccessible. This triad of impacts corresponds closely with CWE-269 Improper Privilege Management and CWE-78 OS Command Injection if the vulnerability involves command execution capabilities within the database context. Furthermore, in terms of MITRE ATT&CK framework mapping, this scenario reflects techniques associated with Initial Access through valid accounts followed by Defense Evasion or Credential Access to maintain persistence and expand control over the infrastructure. The scope change mentioned implies that other integrated systems may also fall under attack, amplifying the potential damage significantly beyond just database corruption.
Mitigation strategies must prioritize immediate patching of all affected Oracle Database Server versions within the specified range from 23.4.0 to 23.26.3. Organizations should apply the latest security patches provided by Oracle as soon as they are available and tested in non-production environments to ensure stability. In addition to patching, implementing strict network segmentation is crucial to limit access to Oracle Net services only from trusted IP addresses or subnets that require database connectivity. Enforcing multi-factor authentication for all administrative accounts can further reduce the risk of unauthorized authenticated users gaining initial footholds. Regular auditing of user privileges and monitoring for anomalous login patterns using security information and event management tools will help detect potential exploitation attempts early. Finally, conducting regular vulnerability assessments and penetration tests focused on database configurations ensures that any misconfigurations or unpatched systems are identified and remediated before they can be exploited by malicious actors seeking to compromise critical enterprise assets.