CVE-2026-79833 in NonStop ANSI SQLUTIL
Summary
by MITRE • 10/15/2026
A vulnerability in HPE NonStop ANSI SQLUTIL may allow a remote unauthenticated actor to cause an affected service to terminate unexpectedly, causing a denial of service.
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Analysis
by VulDB Data Team • 10/15/2026
The HPE NonStop platform has long been recognized for its high availability and fault tolerance capabilities, particularly within critical infrastructure sectors such as finance, healthcare, and telecommunications where continuous operation is paramount. The ANSI SQLUTIL component serves as a vital interface allowing applications to interact with the database management systems underlying this environment using standard Structured Query Language commands. A recently identified vulnerability in this specific utility introduces a significant risk vector by permitting remote unauthenticated actors to trigger an unexpected termination of the affected service. This flaw fundamentally undermines the reliability guarantees that HPE NonStop is designed to provide, as it allows external entities to disrupt core database operations without requiring any form of authentication or prior access credentials.
From a technical perspective, this vulnerability represents a classic denial-of-service condition resulting from improper input validation or error handling within the SQLUTIL processing logic. When an unauthenticated user sends specifically crafted requests to the service, the utility fails to handle these inputs gracefully, leading to a crash or forced termination of the process. This behavior aligns with CWE-20 Improper Input Validation and CWE-400 Uncontrolled Resource Consumption, as the system does not adequately sanitize incoming data before processing it against internal state machines or memory structures. The lack of authentication requirements exacerbates the severity, placing this vulnerability squarely within the realm of remote code execution risks that do not require user interaction or privilege escalation to exploit, thereby increasing its attack surface significantly compared to authenticated-only flaws.
The operational impact of such a denial-of-service event is severe in environments where HPE NonStop systems are deployed for transaction processing and data integrity assurance. An unexpected termination of the SQLUTIL service can lead to immediate disruption of database connectivity for dependent applications. In high-throughput financial trading platforms or real-time healthcare monitoring systems, even brief interruptions can result in lost transactions, corrupted data states, or delayed critical alerts. Furthermore, repeated exploitation attempts could cause cascading failures if load balancers or failover mechanisms are not configured with sufficient resilience against rapid service restarts and connection drops. The availability of the system is directly compromised, violating the core tenets of the CIA triad regarding confidentiality, integrity, and especially availability in this context.
To mitigate these risks, organizations must implement immediate network-level controls to restrict access to the HPE NonStop ANSI SQLUTIL interface. Since the vulnerability allows unauthenticated remote exploitation, it is critical that firewall rules or Access Control Lists are configured to permit connections only from known, trusted application servers and administrative workstations. Additionally, deploying intrusion detection systems with signatures capable of identifying malformed SQL queries or anomalous traffic patterns targeting this specific utility can provide an additional layer of defense in depth. It is also imperative to apply the latest vendor patches as soon as they become available, ensuring that the underlying codebase addresses the input validation deficiencies identified by security researchers. Regular vulnerability assessments and penetration testing should be conducted to verify that these mitigations are effective and that no other similar flaws exist within adjacent components of the NonStop architecture.
This incident highlights the importance of maintaining strict network segmentation for legacy or specialized database interfaces, even when they appear isolated from public-facing networks. Attackers often probe internal services using automated tools looking for unauthenticated entry points to establish a foothold or cause disruption. By treating the SQLUTIL service with the same level of security rigor as internet-exposed web servers—through strict access controls, monitoring, and timely patching—organizations can preserve the high-availability promise of their HPE NonStop infrastructure while preventing malicious actors from exploiting this specific weakness to degrade system performance or availability.