Stack-Based Buffer Overflow in D-Link DIR-867 Product
CVE-2025-6334

8.7HIGH

Key Information:

Vendor

D-link
Status
Dir-867
Vendor
CVE Published:
20 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6334?

A vulnerability present in the D-Link DIR-867 router allows for a stack-based buffer overflow due to improper handling of the strncpy function within the Query String Handler component. This flaw can be exploited remotely, potentially allowing attackers to execute arbitrary code or crash the device. This issue specifically impacts versions of the DIR-867 that are no longer supported by D-Link, making it crucial for users to be aware of their device's security status and consider upgrading or implementing alternative security measures.

Affected Version(s)

DIR-867 1.0

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-2025-6334 - Proof of Concept

References

https://vuldb.com/?id.313330
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313330
signaturepermissions-required
https://vuldb.com/?submit.596579
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

liuchangwei (VulDB User)
.
CVE-2025-6334 : Stack-Based Buffer Overflow in D-Link DIR-867 Product