Stack-Based Buffer Overflow in Linksys Routers RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000
CVE-2025-9357

8.7HIGH

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9357?

A stack-based buffer overflow vulnerability was discovered in certain Linksys routers (RE6250, RE6300, RE6350, RE6500, RE7000, RE9000) impacting the langSwitchByBBS function. This flaw allows attackers to manipulate the langSelectionOnly argument, potentially leading to remote code execution. Publicly available exploits pose significant risks, as the vendor has not responded to early disclosure efforts. Immediate attention is required to mitigate the risk associated with this vulnerability.

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-2025-9357 - Proof of Concept

References

https://vuldb.com/?id.321060
vdb-entrytechnical-description
https://vuldb.com/?ctiid.321060
signaturepermissions-required
https://vuldb.com/?submit.631529
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

pjq123 (VulDB User)
.
CVE-2025-9357 : Stack-Based Buffer Overflow in Linksys Routers RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000