Buffer Overflow Vulnerability in UTT ่ฟ›ๅ– 520W Router
CVE-2025-14140

7.1HIGH

Key Information:

Vendor

Utt

Status
่ฟ›ๅ– 520w
Vendor
CVE Published:
6 December 2025

Badges

๐Ÿ‘พ Exploit Exists๐ŸŸก Public PoC

What is CVE-2025-14140?

A vulnerability found in the UTT ่ฟ›ๅ– 520W router, specifically in the strcpy function of the websHostFilter file, allows for a buffer overflow due to improper handling of the addHostFilter argument. This vulnerability can be exploited remotely, enabling malicious actors to gain unauthorized access or perform other harmful actions. Notably, the vendor has not responded to disclosures regarding this critical security issue, leaving users at risk.

Affected Version(s)

่ฟ›ๅ– 520W 1.7.7-180627

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-14140 - Proof of Concept

References

https://vuldb.com/?id.334528
vdb-entrytechnical-description
https://vuldb.com/?ctiid.334528
signaturepermissions-required
https://vuldb.com/?submit.698521
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • ๐ŸŸก

    Public PoC available

  • ๐Ÿ‘พ

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

cymiao (VulDB User)
JSON
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CVE-2025-14140 : Buffer Overflow Vulnerability in UTT ่ฟ›ๅ– 520W Router