Stack-based Buffer Overflow in Linksys Routers and Extenders
CVE-2025-9251

8.7HIGH

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9251?

A security flaw has been identified in several Linksys router and extender models which is triggered by manipulating the Ssid argument in the sta_wps_pin function. This vulnerability allows attackers to remotely execute a stack-based buffer overflow, potentially compromising the device. Despite early contact, the vendor has not addressed the issue or provided any response about the vulnerability disclosure.

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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-2025-9251 - Proof of Concept

References

https://vuldb.com/?id.320782
vdb-entrytechnical-description
https://vuldb.com/?ctiid.320782
signaturepermissions-required
https://vuldb.com/?submit.631524
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)
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