CVE-2026-1137 is a buffer overflow vulnerability identified in the UTT 进取 520W device, specifically in version 1.7.7-180627. The vulnerability resides in the strcpy function used in the /goform/formWebAuthGlobalConfig endpoint. Because strcpy does not perform bounds checking, an attacker can send a specially crafted request to this endpoint to overflow the buffer, potentially overwriting memory and enabling arbitrary code execution or causing a denial of service. The vulnerability is remotely exploitable without requiring authentication or user interaction, making it highly accessible to attackers. The CVSS 4.0 score is 8.7, reflecting the high impact on confidentiality, integrity, and availability, with low attack complexity and no privileges needed. The vendor was contacted early but has not responded or issued a patch, and a public exploit is available, increasing the likelihood of exploitation in the wild. The affected product is a network device likely used for authentication or network access control, making it a critical component in organizational infrastructure. The lack of vendor response and public exploit availability heightens urgency for mitigation. No official patches or updates have been released, so organizations must rely on network-level controls and monitoring to defend against potential attacks.

The vulnerability allows remote attackers to cause buffer overflow on the UTT 进取 520W device, potentially leading to remote code execution, unauthorized access, or denial of service. For European organizations, this could result in compromise of network authentication mechanisms, disruption of network services, and exposure of sensitive data. Critical infrastructure or enterprises using this device for network access control could face operational outages or breaches. The lack of vendor patch increases risk, as attackers can leverage public exploits to target vulnerable devices. This could lead to lateral movement within networks, data exfiltration, or persistent footholds. The impact extends beyond individual devices to the broader network environment, threatening confidentiality, integrity, and availability of organizational IT assets.

1. Immediately restrict network access to the /goform/formWebAuthGlobalConfig endpoint by implementing firewall rules or access control lists to limit exposure to trusted management networks only. 2. Deploy web application firewalls (WAF) with custom rules to detect and block malformed requests targeting the strcpy buffer overflow. 3. Isolate affected UTT 进取 520W devices from critical network segments until a vendor patch is available. 4. Monitor network traffic and device logs for unusual activity or exploitation attempts targeting this endpoint. 5. Consider replacing or upgrading affected devices to alternative products with active vendor support and security updates. 6. Engage with UTT vendor for updates and advisories, and subscribe to threat intelligence feeds for emerging exploit information. 7. Conduct internal vulnerability scans and penetration tests to identify any exposure to this vulnerability within the network. 8. Implement network segmentation to limit potential lateral movement if exploitation occurs.