Stack-Based Buffer Overflow in Linksys RE Series Routers
CVE-2025-9481

8.7HIGH

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9481?

A stack-based buffer overflow vulnerability has been identified in the Linksys RE series routers, specifically in the setIpv6 function located in the /goform/setIpv6 file. An attacker can exploit this vulnerability by manipulating the 'tunrd_Prefix' argument, leading to potential remote code execution. Although the issue was reported to Linksys prior to public disclosure, there was no response from the vendor, increasing the urgency for affected users to apply necessary security measures.

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-2025-9481 - Proof of Concept

References

https://vuldb.com/?id.321396
vdb-entrytechnical-description
https://vuldb.com/?ctiid.321396
signaturepermissions-required
https://vuldb.com/?submit.634819
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

Bond_yes (VulDB User)
.
CVE-2025-9481 : Stack-Based Buffer Overflow in Linksys RE Series Routers