Stack-Based Buffer Overflow in Linksys Wireless Routers
CVE-2025-8819

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-2025-8819?

A stack-based buffer overflow vulnerability has been identified in several models of Linksys wireless routers, including the RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000, affecting firmware versions up to 20250801. This security flaw exists in the 'setWan' function of the '/goform/setWan' file, where improper handling of the 'staticIp' argument permits potential remote attackers to exploit the vulnerability. Given that this exploit has already been disclosed publicly and there has been no response from the vendor, users are urged to take immediate action to secure their devices against potential attacks.

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-2025-8819 - Proof of Concept

References

https://vuldb.com/?id.319353
vdb-entrytechnical-description
https://vuldb.com/?ctiid.319353
signaturepermissions-required
https://vuldb.com/?submit.626683
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)
.