CVE-2025-14141 is a high severity buffer overflow flaw (CVSS 8.8) in UTT 520W router 1.7.7-180627, affecting the strcpy call behind /goform/formArpBindConfig, through the pools argument. No fix is listed and the vendor did not respond, so cut exposure and watch for a patch.
What's affected
The affected component is the strcpy call behind /goform/formArpBindConfig, through the pools argument. The record describes a buffer overflow and says the attack can be performed remotely.
Affected version: 1.7.7-180627. The record names no fixed version and says the vendor was contacted early but did not respond.
The CVSS vector is AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. The attack vector is the network, and the vector lists low privileges required, so an attacker needs some kind of valid account first. The weakness classes are CWE-119, CWE-120.
The CVE record states that the exploit has been disclosed publicly. That is not the same as exploitation in the wild, which the record does not report, and the CISA Known Exploited Vulnerabilities flag is false. Still, public details lower the effort needed to attack an exposed instance.
How to check if you're exposed
This is router firmware, so the check is about inventory and exposure.
- Log in to the device and note the model and firmware version. Compare it with the version in this post.
- From outside your network, test whether the management interface answers. If it does, restrict it first.
- Look for the device in your asset records. Branch and home office routers are often missing.
nmap -p 80,443,8080 YOUR_PUBLIC_IP
Only scan addresses you own or are authorised to test. A device whose management page is reachable from the internet and has a memory corruption flaw in a web handler is a high priority, whatever the vector says about privileges.
What to do now
- Identify every UTT 520W unit and its firmware version.
- Disable remote administration and limit the web interface to a trusted management network.
- Set a strong unique administrator password. The CVSS vector for this record needs a low-privilege login, so a strong password limits who can reach the vulnerable function.
- Put the device in its own network segment so that a crash or compromise does not reach servers.
- Check the vendor support page for newer firmware.
- If the vendor never ships firmware, plan to replace the device with a supported model.
Why it matters
A buffer overflow (CWE-119, CWE-120) happens when code copies more data into a fixed-size memory area than it can hold. The extra bytes overwrite neighbouring memory, which at best crashes the device and at worst changes what it executes.
The vector lists high impact on confidentiality, integrity and availability, which is why the score is 8.8 even though a login is needed. Embedded devices often have fewer memory protections than servers, which can make overflows easier to abuse.
Quick check
Why is this a high score if a login is needed?
The attack vector is the network, and the vector lists low privileges required, so an attacker needs some kind of valid account first. Router credentials are often weak, shared or left at defaults, so the requirement is a thin barrier.
Will the vendor patch this?
The record names no fixed version and says the vendor was contacted early but did not respond.
Sources
- Gold vulnerability page for CVE-2025-14141
- CVE record for CVE-2025-14141 as published by its CNA, with a published date of 2025-12-06
- Free in-browser dependency scan: gold.safeguard.sh/scan
Last reviewed: 19 October 2026.
