CVE-2026-110491 in Kiloview
Summary
by MITRE • 10/23/2026
The ONVIF service on the E3 can be rendered unresponsive by sending malformed or incomplete requests to certain operations. The affected service stops accepting new connections while the rest of the device continues operating normally, and will recover automatically after a period. This can be triggered repeatedly by any unauthenticated party with network access to the device.
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Analysis
by VulDB Data Team • 10/23/2026
The vulnerability identified in the ONVIF service on the E3 device represents a significant availability risk stemming from improper input validation within the network-facing application layer. The core technical flaw lies in the handling of malformed or incomplete requests directed at specific operations exposed by the Open Network Video Interface Forum protocol implementation. When an attacker sends these ill-formed packets, the underlying software fails to gracefully handle the error condition, leading to a state where the service process becomes unresponsive. This behavior indicates that the application likely enters an infinite loop, deadlocks on a resource lock, or exhausts internal memory buffers without proper cleanup mechanisms in place for exceptional input scenarios. The lack of robust exception handling allows external actors to disrupt the normal execution flow of the ONVIF daemon, effectively causing a denial of service condition specific to this subsystem rather than affecting the entire device firmware.
From an operational perspective, the impact is characterized by a partial system degradation where the video streaming and management interface provided by the ONVIF service becomes unavailable. While the rest of the device continues operating normally, meaning core functions such as local recording or non-networked features may persist, the inability to accept new connections prevents remote configuration changes, live view access via standard protocols, and integration with third-party surveillance software that relies on this interface. This isolation of the failure mode suggests a lack of process isolation or resource partitioning between the ONVIF service and other critical device functions. The automatic recovery after a period indicates that the system has some form of watchdog timer or periodic restart mechanism for the affected service, but this does not mitigate the immediate impact nor prevent repeated exploitation attempts from causing intermittent outages.
The exploitability profile of this vulnerability is particularly concerning due to its low barrier to entry and high repeatability. Any unauthenticated party with network access to the device can trigger this condition without needing valid credentials or prior authentication steps. This aligns with common attack vectors where adversaries leverage open ports on internet-facing devices to disrupt services for ransom, protest, or competitive advantage. The ability to repeatedly trigger the crash means that an attacker could maintain a persistent denial of service state by continuously sending malformed requests faster than the automatic recovery mechanism can restore functionality. This persistence transforms what might otherwise be a transient glitch into a sustained operational disruption for users relying on remote video surveillance capabilities.
In terms of industry classification, this vulnerability maps to CWE-20 Improper Input Validation and CWE-400 Uncontrolled Resource Consumption within the Common Weakness Enumeration framework. The failure to validate request structure before processing leads directly to resource exhaustion or process hang conditions. From a tactical standpoint, according to the MITRE ATT&CK framework, this behavior is consistent with techniques used in Denial of Service attacks, specifically those targeting application layer services rather than network infrastructure. Attackers often utilize such vulnerabilities as part of broader campaigns to disable security monitoring systems before executing further intrusions or data exfiltration activities.
Mitigation strategies should prioritize immediate patching if a vendor update is available that addresses the input validation logic within the ONVIF service implementation. In the absence of an official fix, network-level controls are essential for risk reduction. Implementing strict firewall rules to restrict access to the ONVIF port exclusively from trusted management subnets can significantly reduce the attack surface by preventing unauthenticated external parties from reaching the vulnerable endpoint. Additionally, deploying intrusion prevention systems with signatures capable of detecting malformed SOAP or XML requests associated with this specific vulnerability pattern may help filter out malicious traffic before it reaches the device application layer. Regular monitoring for unusual spikes in connection attempts to the ONVIF service can also serve as an early warning indicator for ongoing exploitation attempts, allowing administrators to respond proactively despite the automatic recovery mechanism.