# CVE-2025-10756: UTT HiPER 840G getOneApConfTempEntry buffer overflow

> Remote attackers can trigger a buffer overflow in the UTT HiPER 840G router via the tempName parameter, potentially leading to code execution or service disruption.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Sep 2025
- **Updated:** 22 Sep 2025
- **Also known as:** GHSA-5p52-jh9x-m839

## What is CVE-2025-10756?

CVE-2025-10756 is a high-severity memory corruption vulnerability in UTT HiPER 840G, published on 20 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security flaw has been discovered in UTT HiPER 840G up to 3.1.1-190328. Impacted is an unknown function of the file /goform/getOneApConfTempEntry. The manipulation of the argument tempName results in buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be exploited. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-10756?

It affects 1 product.


Products: Utt 840g Firmware.

## How do I fix CVE-2025-10756?

No fix has been published for CVE-2025-10756 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-10756 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-10756 exists.

## Other vulnerabilities in UTT HiPER 840G

- [CVE-2025-11305](https://insights.sbomify.com/CVE-2025-11305/): UTT HiPER 840G formTaskEdit strcpy buffer overflow (high 8.7)
- [CVE-2025-7570](https://insights.sbomify.com/CVE-2025-7570/): UTT HiPER 840G aspRemoteApConfTempSend buffer overflow (high 8.7)
- [CVE-2025-7571](https://insights.sbomify.com/CVE-2025-7571/): UTT HiPER 840G aspApBasicConfigUrcp buffer overflow (high 8.7)
- [CVE-2025-7117](https://insights.sbomify.com/CVE-2025-7117/): UTT HiPER 840G websWhiteList buffer overflow (high 8.7)
- [CVE-2025-7118](https://insights.sbomify.com/CVE-2025-7118/): UTT HiPER 840G formPictureUrl buffer overflow (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-10756 and fix it if it is affected.

What it is: CVE-2025-10756 is a high-severity memory corruption vulnerability in UTT HiPER 840G, published on 20 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-10756 exists.

Affected product: UTT HiPER 840G. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-10756/ (Markdown: https://insights.sbomify.com/CVE-2025-10756/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-10756
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-10756
- OSV: https://osv.dev/vulnerability/CVE-2025-10756

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-10756/
Summaries are generated and may contain mistakes; the official description above is the record.