Is CVE-2026-52189 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-52189 being exploited in the wild.

How severe is CVE-2026-52189?

Informational severity, with a CVSS score of 5.3, published 2 July 2026.

Which products and versions are affected?

UTT NV518G nv518GV3v3.2.7-210919-161313.

Is there a fix for CVE-2026-52189?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-52189 attacked?

It is attacked over the network, in an operating system.

Am I affected by CVE-2026-52189?

Check whether you run UTT NV518G at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-52189: UTT nv518G buffer overflow in gohead/sub_487330

CVE-2026-52189 · Severity: info · CVSS 5.3 · Published 2026-07-02

A security vulnerability exists in UTT nv518G enterprise routers that could allow a remote attacker to crash the device. By sending a specially crafted web request, an attacker can trigger a buffer overflow, leading to a denial of service. This can disrupt internet connectivity and business operations for organizations relying on these routers.

Technologies: UTT NV518G. Vendors: UTT.

Quick answers

Is CVE-2026-52189 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-52189 being exploited in the wild.
How severe is CVE-2026-52189?: Informational severity, with a CVSS score of 5.3, published 2 July 2026.
Which products and versions are affected?: UTT NV518G nv518GV3v3.2.7-210919-161313.
Is there a fix for CVE-2026-52189?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-52189 attacked?: It is attacked over the network, in an operating system.
Am I affected by CVE-2026-52189?: Check whether you run UTT NV518G at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow vulnerability exists in the GoAhead web server component of UTT nv518G routers, specifically within the function sub_487330. The vulnerability is caused by a lack of length validation on the 'indexIDNew' parameter provided in a POST request. A remote, unauthenticated attacker can exploit this by sending an excessively long string in the 'indexIDNew' variable, overwriting adjacent memory on the stack. Successful exploitation results in a crash of the web service or the entire device, leading to a denial of service (DoS).

Affected products

UTT nv518G firmware nv518GV3v3.2.7-210919-161313

Timeline

2026-07-02: advisory: CVE-2026-52189 published by NVD

References

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