Buffer Overflow in UTT ่ฟ›ๅ– 520W Router
CVE-2025-14139

6.9MEDIUM

Key Information:

Vendor

Utt

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

Badges

๐Ÿ‘พ Exploit Exists๐ŸŸก Public PoC

What is CVE-2025-14139?

A security flaw has been identified in the UTT ่ฟ›ๅ– 520W router, specifically within the function strcpy in the /goform/formConfigDnsFilterGlobal file. This vulnerability stems from improper handling of the argument timeRangeName, leading to a potential buffer overflow. This exploit has been publicly disclosed, making systems using the affected version susceptible to manipulation. Despite early warnings to the vendor, no response has been recorded.

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-2025-14139 - Proof of Concept

References

https://vuldb.com/?id.334527
vdb-entrytechnical-description
https://vuldb.com/?ctiid.334527
signaturepermissions-required
https://vuldb.com/?submit.698520
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Adjacent 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-2025-14139 : Buffer Overflow in UTT ่ฟ›ๅ– 520W Router