CVE-2026-52193 in nv518G
Summary
by MITRE • 07/01/2026
Buffer Overflow vulnerability in UTT nv518G nv518GV3v3.2.7-210919-161313 allows a remote attacker to cause a denial of service via the gohead/sub_447CAC component
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Analysis
by VulDB Data Team • 07/01/2026
This buffer overflow vulnerability exists within the UTT nv518G device firmware version nv518GV3v3.2.7-210919-161313 and specifically affects the gohead/sub_447CAC component. The flaw represents a classic stack-based buffer overflow condition that occurs when untrusted data is copied into a fixed-size buffer without proper bounds checking. This vulnerability resides in the device's web server implementation and can be triggered through malformed input sent to the affected subsystem. The buffer overflow occurs during processing of HTTP requests or specific API calls that are handled by the sub_447CAC function, which fails to validate input length before copying data into insufficiently sized memory buffers.
The operational impact of this vulnerability extends beyond simple denial of service as it creates potential for more severe consequences including arbitrary code execution and complete system compromise. When exploited successfully, the buffer overflow allows remote attackers to overwrite adjacent memory locations including return addresses and function pointers, potentially enabling privilege escalation or system state corruption. This vulnerability affects devices that implement the gohead web server framework and are configured with the specific firmware version mentioned. The attack surface is particularly concerning as it operates over network protocols without requiring authentication, making it accessible to any remote attacker who can reach the device's network interface.
The technical implementation of this vulnerability aligns with CWE-121 Stack-based Buffer Overflow, which is categorized under the Common Weakness Enumeration framework as a fundamental memory safety issue. This weakness type commonly appears in embedded systems and firmware implementations where developers prioritize functionality over security validation. The ATT&CK framework would classify this vulnerability under T1203 Exploitation for Client Execution and potentially T1499 Endpoint Denial of Service, as the primary impact manifests through service disruption. Network-based exploitation requires no special privileges or user interaction, making it particularly dangerous in environments where these devices are exposed to untrusted networks or internet-facing interfaces.
Mitigation strategies should include immediate firmware updates from UTT to address the buffer overflow condition, along with network segmentation to limit access to affected devices. Implementing input validation and bounds checking within the gohead subsystem would prevent the overflow condition from occurring. Additionally, network monitoring should be deployed to detect anomalous traffic patterns that might indicate exploitation attempts. Device administrators should also consider disabling unnecessary services and implementing robust access controls to reduce the attack surface. Regular security assessments of embedded firmware components are essential as these vulnerabilities often remain undetected for extended periods due to the complexity of embedded system security validation processes. Organizations should prioritize patch management procedures specifically targeting firmware versions that contain known buffer overflow conditions in web server implementations.