# CVE-2026-2935: UTT HiPER 810G ConfigExceptMSN strcpy buffer overflow

> Remote attackers can trigger a buffer overflow in the UTT HiPER 810G router via the remark argument, potentially leading to code execution or service disruption.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Feb 2026
- **Updated:** 25 Feb 2026
- **Also known as:** GHSA-9cqv-87fq-8fjx

## What is CVE-2026-2935?

CVE-2026-2935 is a high-severity memory corruption vulnerability in UTT HiPER 810G, published on 22 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A weakness has been identified in UTT HiPER 810G up to 1.7.7-171114. This issue affects the function strcpy of the file /goform/ConfigExceptMSN. Executing a manipulation of the argument remark can lead to buffer overflow. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks.

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-2026-2935?

It affects 1 product.


Products: Utt 810g Firmware.

## How do I fix CVE-2026-2935?

No fix has been published for CVE-2026-2935 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2935 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2935 exists.

## Other vulnerabilities in UTT HiPER 810G

- [CVE-2026-3814](https://insights.sbomify.com/CVE-2026-3814/): UTT HiPER 810G getOneApConfTempEntry strcpy buffer overflow (high 8.7)
- [CVE-2026-3815](https://insights.sbomify.com/CVE-2026-3815/): UTT HiPER 810G formApMail strcpy buffer overflow (high 8.7)
- [CVE-2026-3698](https://insights.sbomify.com/CVE-2026-3698/): UTT HiPER 810G NTP strcpy buffer overflow (high 8.7)
- [CVE-2026-3699](https://insights.sbomify.com/CVE-2026-3699/): UTT HiPER 810G formRemoteControl strcpy buffer overflow (high 8.7)
- [CVE-2026-3700](https://insights.sbomify.com/CVE-2026-3700/): UTT HiPER 810G formConfigDnsFilterGlobal strcpy buffer overflow (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2935 and fix it if it is affected.

What it is: CVE-2026-2935 is a high-severity memory corruption vulnerability in UTT HiPER 810G, published on 22 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2935 exists.

Affected product: UTT HiPER 810G. 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-2026-2935/ (Markdown: https://insights.sbomify.com/CVE-2026-2935/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2935
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2935
- OSV: https://osv.dev/vulnerability/CVE-2026-2935

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2935/
Summaries are generated and may contain mistakes; the official description above is the record.