Stack-based Buffer Overflow in Linksys Wi-Fi Range Extenders
CVE-2025-9246

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-2025-9246?

A vulnerability exists in various Linksys Wi-Fi range extenders, where improper handling of input in the check_port_conflict function can lead to a stack-based buffer overflow. This flaw allows remote attackers to manipulate the arguments of single_port_rule/port_range_rule, potentially compromising device integrity. Despite the severity of this issue, the vendor has not provided a response to the initial disclosure, raising concerns over the security of impacted products.

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-2025-9246 - Proof of Concept

References

https://vuldb.com/?id.320777
vdb-entrytechnical-description
https://vuldb.com/?ctiid.320777
signaturepermissions-required
https://vuldb.com/?submit.631519
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-2025-9246 : Stack-based Buffer Overflow in Linksys Wi-Fi Range Extenders