Stack-Based Overflow in Linksys Wireless Routers
CVE-2025-9392

8.7HIGH

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9392?

A stack-based buffer overflow vulnerability has been identified in Linksys routers, compromising the qosClassifier function within the file /goform/qosClassifier. This issue allows remote attackers to exploit manipulated arguments such as dir, sFromPort, sToPort, dFromPort, dToPort, protocol, layer7, dscp, and remark_dscp, potentially leading to unauthorized access and control over the device. Immediate attention is recommended, as the exploit has been publicly disclosed and could be actively used. Despite early notification, the vendor has not responded.

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-2025-9392 - Proof of Concept

References

https://vuldb.com/?id.321225
vdb-entrytechnical-description
https://vuldb.com/?ctiid.321225
signaturepermissions-required
https://vuldb.com/?submit.631537
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-2025-9392 : Stack-Based Overflow in Linksys Wireless Routers