Buffer Overflow Vulnerability in UTT 进取 520W by UTT
CVE-2026-0839

8.7HIGH

Key Information:

Vendor

Utt

Status
进取 520w
Vendor
CVE Published:
11 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-0839?

A vulnerability has been discovered in the UTT 进取 520W router affecting version 1.7.7-180627, specifically within the strcpy function in the /goform/APSecurity file. This weakness allows for a buffer overflow condition when the argument wepkey1 is manipulated, potentially enabling remote execution of harmful code. The risk is exacerbated by the public availability of exploit techniques, as the vendor has not addressed this issue despite early notification.

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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-2026-0839 - Proof of Concept

References

https://vuldb.com/?id.340439
vdb-entrytechnical-description
https://vuldb.com/?ctiid.340439
signaturepermissions-required
https://vuldb.com/?submit.729028
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

GUOTINGTING (VulDB User)
JSON
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