Stack-Based Buffer Overflow in Linksys Wireless Range Extenders
CVE-2025-9247

8.7HIGH

Key Information:

Vendor

Linksys
Status
Re6250
Re6300
Re6350
Re6500
Vendor
CVE Published:
20 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9247?

A vulnerability has been identified in multiple models of Linksys wireless range extenders, wherein a stack-based buffer overflow occurs in the setVlan function within the setVlan file. The issue arises from improper handling of the vlan_set argument, allowing remote attackers to exploit this weakness. The vulnerability's existence has been publicly disclosed, and the vendor has not provided a response to reports of the exploit. Users of affected devices should take precautionary measures to mitigate potential risks.

Affected Version(s)

RE6250 1.0.013.001

RE6250 1.0.04.001

RE6250 1.0.04.002

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-2025-9247 - Proof of Concept

References

https://vuldb.com/?id.320778
vdb-entrytechnical-description
https://vuldb.com/?ctiid.320778
signaturepermissions-required
https://vuldb.com/?submit.631520
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

pjqwudi (VulDB User)
.
CVE-2025-9247 : Stack-Based Buffer Overflow in Linksys Wireless Range Extenders