Stack-Based Buffer Overflow Vulnerability in Linksys Wireless Routers
CVE-2025-8817

8.7HIGH

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-8817?

A stack-based buffer overflow vulnerability has been discovered in the Linksys RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 routers, specifically within the 'setLan' function of the '/goform/setLan' file. This flaw arises when the 'lan2enabled' argument is manipulated, potentially allowing remote attackers to execute arbitrary code. The vulnerability is publicly disclosed, increasing the risk of exploitation, especially given the lack of response from the vendor upon notification.

Affected Version(s)

RE6250 20250801

RE6300 20250801

RE6350 20250801

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-2025-8817 - Proof of Concept

References

https://vuldb.com/?id.319351
vdb-entrytechnical-description
https://vuldb.com/?ctiid.319351
signaturepermissions-required
https://vuldb.com/?submit.626681
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-2025-8817 : Stack-Based Buffer Overflow Vulnerability in Linksys Wireless Routers