CVE-2026-87422 in Solaris
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle Solaris product of Oracle Systems (component: Services). The supported version that is affected is 11.4. Difficult to exploit vulnerability allows unauthenticated attacker with logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Solaris accessible data. CVSS 3.1 Base Score 2.5 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Services component of Oracle Solaris version 11.4, representing a specific weakness in how the operating system handles certain service interactions under constrained conditions. This flaw is characterized by its difficulty to exploit and requires a unique set of circumstances for successful execution. Specifically, an unauthenticated attacker must first establish logon access to the infrastructure where Oracle Solaris is executing. This prerequisite significantly raises the barrier to entry compared to remote network-based attacks, as it necessitates physical or logical proximity that allows for initial authentication without valid credentials, often implying a failure in underlying identity management or session handling mechanisms within the service layer.
The operational impact of this vulnerability centers on integrity violations rather than confidentiality breaches or availability disruptions. Upon successful exploitation, which is further complicated by the requirement for human interaction from an individual other than the attacker, the adversary can gain unauthorized capabilities to update, insert, or delete data accessible through Oracle Solaris services. This type of action aligns with CWE-352 Cross-Site Request Forgery principles if web-based interfaces are involved, or more broadly with CWE-798 Use of Hard-coded Credentials if authentication bypass is the vector, though the specific mechanism depends on the exact service implementation. The core issue lies in the system's failure to properly validate user intent or session context before allowing data modification operations, leading to unauthorized state changes within the operating environment.
From a threat modeling perspective using the MITRE ATT&CK framework, this vulnerability facilitates techniques associated with Initial Access and Persistence if the attacker leverages the compromised services for further foothold establishment. The requirement for human interaction suggests potential social engineering elements or phishing vectors where an unsuspecting user might trigger the malicious action while logged into the affected system. This aligns with tactics such as User Execution (T1204) or potentially Drive-by Compromise if browser-based interactions are involved, although the primary classification remains tied to local privilege escalation via service manipulation due to insufficient input validation and access control checks within the Services component.
The CVSS 3.1 base score of 2.5 reflects the low severity primarily due to the high complexity (AC:H) and required user interaction (UI:R), alongside a local attack vector (AV:L). The integrity impact is rated as Low (I:L), indicating that while data modification is possible, it may not lead to critical system compromise or widespread data loss in isolation. However, in environments where Oracle Solaris manages critical infrastructure services, even low-severity integrity issues can be chained with other vulnerabilities to achieve higher levels of exploitation. The absence of confidentiality and availability impacts suggests the flaw does not directly expose sensitive information or cause denial-of-service conditions, focusing instead on subtle but potentially damaging alterations to system data.
Mitigation strategies should focus on strict access control policies and network segmentation to limit unauthenticated logon capabilities within the infrastructure hosting Oracle Solaris 11.4. Organizations must ensure that all services are patched with the latest security updates provided by Oracle Systems, as these typically address known flaws in service handling logic. Additionally, implementing multi-factor authentication for any administrative or interactive sessions can mitigate the risk of unauthorized access required to trigger this vulnerability. Regular auditing of system logs and monitoring for unusual data modification patterns can help detect potential exploitation attempts early. Since human interaction is a key factor, security awareness training regarding suspicious activities that might inadvertently trigger such service interactions is also recommended as part of a defense-in-depth approach.