# CVE-2026-9631: UTT HiPER 1250GW stack overflow in Web Management Interface

Source: https://junglewise.ai/threats/cve-2026-9631-utt-hiper-1250gw-stack-overflow-in-web-management-interface  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-27. Updated: 2026-05-27  
License: CC BY 4.0 with a link back

CVE-2026-9631 · Severity: high · CVSS 8.8 · Published 2026-05-27

UTT HiPER 1250GW enterprise routers are affected by a security flaw in their web management interface. An attacker with access to the management console can send a specially crafted request to crash the device or potentially take full control of the router. This could lead to a complete disruption of network services and unauthorized access to internal network traffic.

Technologies: [UTT HiPER 1250GW](https://junglewise.ai/threats/technologies/hiper-1250gw). Vendors: [UTT](https://junglewise.ai/threats/vendors/utt).

## Quick answers

**Is CVE-2026-9631 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-9631 being exploited in the wild.

**How severe is CVE-2026-9631?** High severity, with a CVSS score of 8.8, published 27 May 2026.

**Which products and versions are affected?** UTT HiPER 1250GW up to 3.2.7-210907-180535.

**Is there a fix for CVE-2026-9631?** 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-2026-9631 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-9631?** Check whether you run UTT HiPER 1250GW 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 UTT HiPER 1250GW router's web management interface. The flaw is located in the /goform/formConfigFastDirectionW endpoint, where the application uses the unsafe 'strcpy' function to process the 'Profile' (or 'ssid') argument without proper bounds checking. An authenticated remote attacker can exploit this by sending a POST request with an oversized string, leading to memory corruption. Successful exploitation can result in a Denial of Service (DoS) or arbitrary code execution. A public exploit (PoC) is available, and the vulnerability affects firmware versions up to 3.2.7-210907-180535.

## Affected products

- UTT HiPER 1250GW up to 3.2.7-210907-180535

## Timeline

- 2026-05-27: advisory: NVD publication date

## References

- [https://github.com/zhouguobing-maker/cve/blob/main/11.md](https://github.com/zhouguobing-maker/cve/blob/main/11.md)
- [https://vuldb.com/submit/818375](https://vuldb.com/submit/818375)
- [https://vuldb.com/vuln/365740](https://vuldb.com/vuln/365740)
- [https://vuldb.com/vuln/365740/cti](https://vuldb.com/vuln/365740/cti)

## Related threats

- [UTT HiPER 1250GW stack buffer overflow in HTTP request handler](https://junglewise.ai/threats/cve-2026-78169-utt-hiper-1250gw-stack-buffer-overflow-in-http-request-handler)
- [UTT HiPER 1250GW stack buffer overflow in getOneApConfTempEntry](https://junglewise.ai/threats/cve-2026-18897-utt-hiper-1250gw-stack-buffer-overflow-in-getoneapconftempentry)
- [UTT HiPER 1250GW stack buffer overflow in APSecurity_5g](https://junglewise.ai/threats/cve-2026-18895-utt-hiper-1250gw-stack-buffer-overflow-in-apsecurity-5g)
- [UTT HiPER 1250GW stack overflow in ConfigWirelessBase_5g](https://junglewise.ai/threats/cve-2026-14721-utt-hiper-1250gw-stack-overflow-in-configwirelessbase-5g)
- [UTT HiPER Router stack buffer overflow in formFireWall](https://junglewise.ai/threats/cve-2026-10293-utt-hiper-router-stack-buffer-overflow-in-formfirewall)