CVE-2025-6734 UTT HiPER 840G API formP2PLimitConfig sub_484E40 buffer overflow
Remote attackers can trigger a buffer overflow in the API to potentially execute code or crash the UTT HiPER 840G router.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-6734?
CVE-2025-6734 is a high-severity memory corruption vulnerability in UTT HiPER 840G, published on 26 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in UTT HiPER 840G up to 3.1.1-190328. It has been rated as critical. This issue affects the function sub_484E40 of the file /goform/formP2PLimitConfig of the component API. The manipulation of the argument except leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2025-6734?
It affects 1 product.
Products include Utt 840g Firmware.
How do I fix CVE-2025-6734?
No fix has been published for CVE-2025-6734 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-6734 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6734 exists.
Other vulnerabilities in UTT HiPER 840G
- CVE-2025-11305 UTT HiPER 840G formTaskEdit strcpy buffer overflow
- CVE-2025-10756 UTT HiPER 840G getOneApConfTempEntry buffer overflow
- CVE-2025-7570 UTT HiPER 840G aspRemoteApConfTempSend buffer overflow
- CVE-2025-7571 UTT HiPER 840G aspApBasicConfigUrcp buffer overflow
- CVE-2025-7117 UTT HiPER 840G websWhiteList buffer overflow
Sources
Also known as GHSA-7h4w-7qm9-53h3.