# CVE-2026-52196: UTT nv518G Buffer Overflow in gohead/sub_416f28

Source: https://junglewise.ai/threats/cve-2026-52196-utt-nv518g-buffer-overflow-in-gohead-sub-416f28  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-30. Updated: 2026-06-30  
License: CC BY 4.0 with a link back

CVE-2026-52196 · Severity: info · CVSS 7.5 · Published 2026-06-30

A buffer overflow vulnerability exists in the UTT nv518G enterprise router. This flaw allows a remote attacker to crash the device's web management service by sending a specially crafted web request. An exploit would result in a denial of service, preventing administrators from managing the network and potentially disrupting network traffic.

Technologies: [UTT NV518G](https://junglewise.ai/threats/technologies/nv518g). Vendors: [UTT](https://junglewise.ai/threats/vendors/utt).

## Quick answers

**Is CVE-2026-52196 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-52196 being exploited in the wild.

**How severe is CVE-2026-52196?** Informational severity, with a CVSS score of 7.5, published 30 June 2026.

**Which products and versions are affected?** UTT NV518G nv518GV3v3.2.7-210919-161313.

**Is there a fix for CVE-2026-52196?** 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-2026-52196 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-52196?** 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 the UTT nv518G router, specifically within the function sub_416f28. The vulnerability is caused by the unsafe use of the 'strcpy' function when processing the 'GroupName' parameter from a POST request. The application fails to validate the length of the user-supplied string before copying it into a fixed-size buffer (InstPointByIndex + 180). A remote, unauthenticated attacker can exploit this by sending an oversized GroupName value, leading to a memory corruption that crashes the service (Denial of Service).

## Affected products

- UTT nv518G nv518GV3v3.2.7-210919-161313

## Timeline

- 2026-06-30: disclosed: Initial disclosure and CVE assignment

## References

- [https://github.com/akuma-QAQ/CVEreport/tree/main/518G/FUN_00416f28](https://github.com/akuma-QAQ/CVEreport/tree/main/518G/FUN_00416f28)
- [https://utt.com.cn/downloadcenter.php?filetypeid=3&model=518G&lang=zhcn](https://utt.com.cn/downloadcenter.php?filetypeid=3&model=518G&lang=zhcn)

## Related threats

- [UTT nv518G command injection in gohead/sub_445C5C](https://junglewise.ai/threats/cve-2026-52192-utt-nv518g-command-injection-in-gohead-sub-445c5c)
- [UTT nv518G Buffer Overflow in gohead/sub_444C8C](https://junglewise.ai/threats/cve-2026-52191-utt-nv518g-buffer-overflow-in-gohead-sub-444c8c)
- [UTT nv518G buffer overflow in gohead/sub_487330](https://junglewise.ai/threats/cve-2026-52189-utt-nv518g-buffer-overflow-in-gohead-sub-487330)
- [UTT nv518G buffer overflow in gohead component](https://junglewise.ai/threats/cve-2026-52188-utt-nv518g-buffer-overflow-in-gohead-component)
- [UTT nv518G buffer overflow in GoAhead sub_483ba0](https://junglewise.ai/threats/cve-2026-52187-utt-nv518g-buffer-overflow-in-goahead-sub-483ba0)