Buffer Overflow Vulnerability in UTT 进取 520W Router
CVE-2026-1139

8.7HIGH

Key Information:

Vendor

Utt

Status
进取 520w
Vendor
CVE Published:
19 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1139?

A buffer overflow vulnerability exists in the UTT 进取 520W router, specifically in the strcpy function of the /goform/ConfigExceptMSN file. This flaw can be exploited remotely, allowing attackers to potentially execute arbitrary code or disrupt services. Despite early disclosure attempts to the vendor, there has been no response, raising concerns about the security posture and responsiveness to vulnerabilities. Users of the affected version are advised to review their configurations and apply any necessary mitigations to secure their devices.

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Deploy the Patch

Affected Version(s)

进取 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-2026-1139 - Proof of Concept

References

https://vuldb.com/?id.341730
vdb-entrytechnical-description
https://vuldb.com/?ctiid.341730
signaturepermissions-required
https://vuldb.com/?submit.735299
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

cymiao (VulDB User)
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